Meet the Mitford Sisters: The Family Tree You Actually Need

Hi Bookish Besties, Six sisters, one brother, and somehow almost the entire political and social spectrum of twentieth-century Britain sitting around the same family table.

If you’ve started reading Nancy Mitford, fallen down the Mitford-family rabbit hole, or watched something about the sisters and immediately thought, Wait, which one was the communist again?, this is the page I wish someone had handed me at the beginning. Because I love the Mitfords as a reading subject, but keeping everybody straight at first is genuinely a small administrative task.

There is Nancy, the novelist. Pamela, the quieter country sister. Diana, who married Britain’s leading fascist. Unity, who became devoted to Hitler. Jessica, who became a communist and investigative writer. Deborah, who became a duchess. And then Tom, the only brother, who tends to disappear from the shorthand because “the six Mitford sisters” became the famous phrase.

Once I finally learned who everyone was, Nancy’s novels became much richer for me. Suddenly the eccentric families, political arguments, private jokes, impossible personalities, and that very specific combination of love and exasperation had context.

So I’m keeping this guide deliberately simple. One sibling at a time. If you want the much darker story of what happened when politics tore this family apart, and why I think Nancy transformed that darkness into such warm, funny fiction, read my deeper essay, The Six Most Scandalous Sisters in England, after this. For now, let’s get everybody’s name tags sorted.

The Mitford Family at a Glance

The Mitford children were born to David Freeman-Mitford, later Lord Redesdale, and his wife Sydney. There were seven children altogether: six daughters and one son. Their upbringing was privileged, eccentric, and unusually insular. The girls received considerably less formal education than their brother, but they read constantly, developed their own private language and elaborate jokes, and grew into women with such wildly different beliefs that their family story sometimes sounds designed by a novelist trying too hard. It wasn’t. That’s the fascinating part.

Nancy Mitford (1904–1973): The Novelist

Nancy is the eldest sister and the one who brought me into this entire family in the first place. She became a novelist, biographer, and one of the great comic observers of English upper-class life. Her best-known novels, The Pursuit of Love and Love in a Cold Climate, took the strange world she grew up in and transformed it into fiction filled with eccentric families, romantic disasters, social rules, private jokes, and some of the funniest character observations I’ve ever read.

If I’m trying to remember Nancy’s place among the sisters, I think of her as the observer. Everyone else was living the drama. Nancy was also watching it.

Politically, she was very different from Diana and Unity and opposed fascism. During the Second World War, she provided British authorities with information about Diana and expressed the belief that her sister represented a genuine danger because of her commitment to fascism and Hitler. That family decision becomes even more extraordinary when you remember how close and intensely connected these siblings had been growing up.

Nancy later made France her home and spent many years in love with French politician and diplomat Gaston Palewski, an attachment that did not give her the secure romantic ending she wanted. That combination—family chaos, political rupture, longing, disappointment, and an almost compulsive ability to make things funny—is a big part of why I find Nancy so interesting.

If you’re new to her books, my Where to Start With Nancy Mitford guide begins with The Pursuit of Love, which is exactly where I would start again.

Pamela Mitford (1907–1994): The Countrywoman

Pamela is the sister people tend to forget when they’re first learning the family, which may say something about how spectacularly dramatic everyone around her was. Within the family she was nicknamed “Woman,” and she preferred animals, farming, food, houses, and rural life to the kind of public political spectacle that made several of her sisters notorious. Honestly, in this family, choosing livestock over fascism or communism feels remarkably sensible.

Pamela did have her own complicated personal life and was hardly invisible, but compared with Diana, Unity, and Jessica, she occupied a quieter lane. I actually find that useful when thinking about the sisters as a group. The Mitford childhood did not automatically produce political extremism, literary celebrity, or aristocratic grandeur. Pamela demonstrates that there were other ways to emerge from that household.

She wanted a country life. Among the Mitfords, that practically qualifies as rebellion through normality.

Tom Mitford (1909–1945): The Only Brother

Tom was the only boy among the seven Mitford children and therefore received educational opportunities his sisters largely did not, including attending Eton. He is less present in the popular mythology because the sisters became such extraordinary public figures, but Tom belonged to the same complicated political world surrounding the family.

He expressed sympathy for fascist ideas before the war and reportedly did not want to fight Germany. During the Second World War he eventually served in the British Army in Asia rather than the European theatre. He was killed in Burma in 1945, only months before the war ended.

Tom is worth keeping in the family picture because otherwise the story becomes artificially tidy: six sisters representing six different versions of womanhood. There was a brother too. And like almost everything involving this family, his story complicates the picture rather than simplifying it.

Diana Mitford (1910–2003): The Fascist

Diana was celebrated as one of the great beauties of her generation, and her life initially followed the glamorous aristocratic script almost perfectly. Then it decidedly did not.

She first married Bryan Guinness, heir to the Guinness fortune, before leaving him and becoming involved with Sir Oswald Mosley, leader of the British Union of Fascists. Diana and Mosley married in 1936 at the Berlin home of Joseph Goebbels, Hitler’s propaganda minister, with Adolf Hitler among the guests. That single sentence gives you some idea of where we are now.

During the Second World War, the British government detained Diana and Mosley under wartime security regulations. They spent several years interned, including time in Holloway Prison. Diana remained committed to Mosley and never became the kind of figure whose politics can simply be brushed away as youthful foolishness.

That matters to me when reading about the family because the Mitfords are sometimes presented almost as glamorous society entertainment. Some of their choices had very real moral and political consequences.

Diana’s relationship with her communist sister Jessica was especially damaged by their opposing beliefs, and the two were estranged for much of their adult lives. They began as sisters in the same nursery. They ended up on opposing ideological poles. That is the Mitford story in miniature.

Unity Mitford (1914–1948): The Nazi

Unity’s story is the one I find hardest to absorb, partly because it begins with details that sound so bizarre they almost distract from how serious everything became. Her full name was Unity Valkyrie Mitford. She was conceived while her parents were staying in the Canadian town of Swastika, a place named long before the symbol became inseparable from Nazi Germany.

Those strange coincidences became much darker when Unity herself developed an intense commitment to Nazism. As a young woman she moved to Germany and deliberately sought access to Adolf Hitler. She repeatedly placed herself where she knew he spent time until she eventually attracted his attention and entered his social circle. She became an outspoken Nazi sympathizer and publicly expressed antisemitic views.

This is why I resist turning Unity into merely “the eccentric sister who knew Hitler.” She wasn’t simply fascinated by a notorious man. She embraced the ideology.

When Britain declared war on Germany on September 3, 1939, Unity attempted suicide in Munich by shooting herself in the head. She survived but was severely injured. The bullet could not safely be removed, and she eventually returned to Britain with lasting physical and cognitive damage. Unity died in 1948 from complications associated with the injury. She was only thirty-three.

The public story is shocking. The family story is sadder. For Nancy and the others, the woman who had become internationally notorious was still the little sister they had grown up with. Holding those two truths together is one of the hardest parts of reading about the Mitfords.

Jessica Mitford (1917–1996): The Communist

If Unity ran toward the political far right, Jessica—known throughout her life as Decca—ran in almost exactly the opposite direction. She became committed to communism while still young and famously eloped with her cousin Esmond Romilly, a nephew of Winston Churchill. The two went to Spain during the Spanish Civil War and later settled in the United States.

Jessica eventually joined the Communist Party USA, although she later left it, and built an influential career as a writer and investigative journalist. Her best-known book, The American Way of Death, published in 1963, investigated the American funeral industry and became a major bestseller and public critique of its business practices.

This is where the Mitford story becomes almost absurdly useful as a map of twentieth-century politics. One sister becomes close to Hitler. Another marries Britain’s leading fascist. Another joins the Communist Party. They aren’t characters in a political allegory. They shared parents.

Jessica and Diana’s political differences became so severe that their relationship fractured for decades. Whenever the Mitfords start feeling like amusing historical celebrities to me, I come back to that. Politics did not stay theoretical in this family. It entered the relationships.

Deborah Mitford (1920–2014): The Duchess

Deborah was the youngest of the Mitford sisters and lived long enough to become something of a bridge between the vanished aristocratic world of her childhood and modern Britain. She married Andrew Cavendish, who unexpectedly became heir to the Dukedom of Devonshire after the death of his older brother during the Second World War. Deborah consequently became Duchess of Devonshire and spent much of her adult life closely connected with Chatsworth.

What I like about Deborah’s story is that “became a duchess” makes her life sound much more passive than it was. Chatsworth was an enormous historic estate facing the practical realities of taxation, maintenance, changing tourism, and the survival of country houses in a completely different century. Deborah became closely involved in making the estate economically viable and accessible to visitors.

She also wrote about her family, country life, chickens, books, houses, and the extraordinary group of siblings she somehow survived. By the time Deborah died in 2014, she had lived through almost a century of the world the Mitfords once represented changing around her. She may be the baby of the family, but in some ways she became its final storyteller.

Why It Helps to Know Who the Mitford Sisters Were Before Reading Nancy

I originally came to this family because of Nancy’s books, not because I was setting out to study twentieth-century British political history. Then the sisters happened. Once you know who they were, it becomes very hard not to keep reading.

But I also think knowing the family changes the experience of Nancy’s fiction in a useful way. The strange intensity of sibling relationships makes more sense. The private language makes more sense. The eccentric fathers and impossible mothers and disastrous marriages start feeling less like comic inventions and more like Nancy taking the raw ingredients of her world and rearranging them into something she could control.

That doesn’t mean every fictional character maps neatly onto a real Mitford. I actually think that’s the less interesting way to read Nancy. What matters more is that she understood this kind of family from the inside. She knew what it felt like to love people who embarrassed you, infuriated you, disappointed you, and occasionally horrified you. That is why the affection and cruelty in her comedy can coexist so comfortably.

The Easiest Way I Remember Them

If the names start blurring together again, this is the shorthand I keep in my own head. Nancy is the novelist who watched everybody. Pamela is the countrywoman who largely stepped away from the spectacle. Diana is the sister who married Mosley and remained associated with British fascism. Unity is the sister who became devoted to Hitler and Nazism. Jessica is the communist who became an investigative journalist in America. Deborah is the duchess who helped shape modern Chatsworth. And Tom is the brother whose story reminds us that the political contradictions of this family were not confined to the sisters.

Once I learned those basic identities, everything else became much easier to place. Then came the dangerous stage where I started remembering nicknames, marriages, children, houses, letters, arguments, and who wasn’t speaking to whom. At that point, I’m afraid you’ve become a Mitford person. Welcome.

If You Really Want to Understand Them, Read the Letters

The thing that finally made the Mitfords feel like people rather than historical characters for me was their correspondence. The Mitfords: Letters Between Six Sisters, edited by Charlotte Mosley, collects decades of letters between Nancy, Pamela, Diana, Unity, Jessica, and Deborah.

And the contrast is extraordinary. These are women whose biographies can be summarized with words like fascism, communism, war, aristocracy, journalism, imprisonment, and scandal. Then you read their letters and encounter jokes, nicknames, ordinary complaints, family news, affection, resentment, gossip, and all the tiny things sisters actually write to one another.

That is where the family becomes human. Not necessarily more admirable. Human. There is an important difference.

If you want the darker story of how those political choices eventually fractured the family—and why I think Nancy’s comic fiction feels even more remarkable once you know what sat underneath it—read The Six Most Scandalous Sisters in England next. And if Nancy is the person you want to follow out of this family tree, my Where to Start With Nancy Mitford guide gives you the exact reading order I would use.

Final Thoughts

I sometimes think you could teach an entire class on twentieth-century Britain without leaving the Mitford family. Fascism enters the house. Communism enters the house. War enters the house. Aristocracy changes around them. Women gain different possibilities for public lives. Celebrity evolves. The country-house world begins disappearing. And somehow six sisters experience all of it from wildly different positions.

That is what keeps pulling me back. Not because I think the Mitfords should be romanticized. Some of their choices deserve exactly the moral seriousness history gives them. But as a family story, they are almost impossible to look away from.

Six girls grew up together speaking private languages and sharing jokes. One became a novelist. One largely chose the countryside. One married a fascist leader. One became a Nazi. One became a communist. One became a duchess. And somehow they remained, however fractured and complicated, the Mitford sisters.

If you want to understand how politics, class, love, loyalty, and family can coexist until they suddenly cannot, you almost don’t need a fictional saga. You need six sisters and their letters.