Whether you adore them or they drive you crazy, siblings play a major part in family dynamics. And while it’s noteworthy when one person in a family accomplishes great things, it’s doubly (or triply) remarkable when multiple siblings achieve greatness. To celebrate National Sibling Day, we’re taking a look at 10 sets of seriously accomplished siblings.

1. Jacob and Wilhelm Grimm
2. Louisa May and Abigail May Alcott
3. Wolfgang and Maria Mozart
4. Venus and Serena Williams
5. Emily and Austin Dickinson
6. The Jackson Siblings
7. William and Caroline Herschel
8. The Wright Siblings
9. Harriet and Catharine Beecher
10. The Brontë Sisters
11. John F. Kennedy and Robert F. Kennedy

Jacob and Wilhelm Grimm

Even if you know nothing about the Brothers Grimm, you’ve no doubt read versions of the fairy tales and folk stories they compiled. Born in modern-day Germany in 1785 and 1786, Jacob and Wilhelm Grimm were young boys when their father died. Their family struggled financially, but both brothers were able to study law at the University of Marburg. Jacob went to work as his professor’s library assistant, and he later became the royal librarian for the new King of Westphalia, Jerome-Napoleon Bonaparte (that Napoleon’s younger brother).

Wilhelm worked as his brother’s library assistant, and because Napoleon had recently conquered much of Germany, the two brothers wanted to help their fellow Germans preserve their culture’s stories. After gathering folk tales from books and committing oral stories to paper, the Brothers Grimm published collections of these stories, including Snow White, Hansel and Gretel, and Rumpelstiltskin. Besides working together, Jacob also lived with Wilhelm and his wife, and Wilhelm named his first son Jacob. Before they died, the Brothers Grimm gave lectures and began work on a comprehensive German dictionary.

Louisa May and Abigail May Alcott

Louisa May Alcott is best known for her bestselling novel Little Women, which she based on her experience growing up with three sisters. But Louisa’s youngest sister—the inspiration for Amy March in Little Women—was an accomplished artist in her own right. Abigail (who went by May) had shown vast artistic promise as a child and young adult, even covering the walls and window frames in the family home with sketches of people and animals, and Louisa used a portion of her new-found fortune to further May’s training.

After studying art in Boston, London, Rome, and Paris, May lived in France and earned spots for her still life and oil paintings in the Paris Salon’s exhibitions. The two sisters were so close that May named her baby daughter Louisa (nicknamed “Lulu”), and just before May died in 1879 (a month after childbirth), she told her husband to send baby Lulu to Louisa in Massachusetts. Louisa raised her niece until her own death eight years later, at which point Lulu went back to Europe to live with her father.

Wolfgang and Maria Mozart

We remember musical wunderkind Wolfgang Amadeus Mozart for his instantly recognizable symphonies and concertos, but his older sister paved the way for him to become one of history’s most famous classical composers. Born in 1751, five years before her brother, Maria Anna Mozart (nicknamed Nannerl) played piano to audiences across Europe before she hit her teens. Her technical skills earned her a reputation as a prodigy and one of the best pianists in Europe.

Nannerl and her younger brother also toured together, wowing audiences with their harpsichord performances. Nannerl wrote down (or possibly collaborated on) her brother’s first symphony, but her father made her stop performing once she turned 18. Still, Nannerl continued to compose music, and Mozart praised his sister’s work. Although some scholars dismiss Nannerl’s talent, others stress that her early interest (and success) in music deeply influenced and inspired her younger brother’s career.

Venus and Serena Williams

There aren’t many athletes more decorated than the Williams sisters. Serena currently holds tennis’s Open Era record for the most Grand Slam singles titles (for a man or woman) with 23, while Venus has won seven on her own, and, in 2000, became the first African American woman to win a single’s title at Wimbledon since 1957. The sisters both have four Olympic gold medals to their name, three of which they won together in doubles play.

The two were born just 15 months apart, with Venus being the oldest. Despite Serena’s otherworldly success, she knows to respects her sister’s seniority in doubles play.

“She’s definitely the boss out there,” Serena joked during an interview with BBC. To which Venus added: “Well I’m the older sister, so it kind of falls on me.”

Emily and Austin Dickinson

Emily Dickinson’s poetry, as well as her mysteriously reclusive later life, continues to enchant readers more than a century after her death. But most people aren’t as familiar with her brother, Austin. Born a year and a half before Emily, Austin graduated from Amherst College and Harvard Law School before working as an attorney. A prominent member of the Amherst community, Austin served as the treasurer of Amherst College, founded the town’s private cemetery, and held leadership roles in civic organizations.

Austin and his wife lived next door to Emily and had a close relationship with the poet—who never had anything published under her own name in her lifetime. After Emily’s death, her sister Lavinia found the poems and was determined to get them published, ultimately enlisting Austin’s longtime mistress, Mabel Loomis Todd, who got her poetry shared with the world.

The Jackson Siblings

From their home base in Gary, Indiana, Joe and Katherine Jackson raised nine children. In 1969, the five eldest brothers (Jackie, Tito, Jermaine, Marlon, and Michael) hit it big as the Jackson 5, delighting audiences with catchy hits such as “I Want You Back” and “ABC.” Since then, the members of the Jackson family have continued to make music, both together and separately.

Although Michael and youngest sister Janet achieved the most success with their music careers, each one of the couple’s seven other children—including sisters Rebbie and La Toya, and youngest brother Randy—achieved musical success in their own right. In fact, all nine Jackson siblings have released solo songs that charted on Billboard charts.

William and Caroline Herschel

Astronomer Sir William Herschel gets the credit for discovering, in March 1781, that Uranus was in fact a planet and not a star, as other astronomers had thought. Herschel also served as King George III’s official Court Astronomer, became president of the Royal Astronomical Society, and identified thousands of star clusters. But Herschel’s younger sister Caroline, born a dozen years after her brother, was also a seriously accomplished astronomer. As a young woman, she moved from her family’s home in Hanover to join her brother in England.

The two siblings shared a love of music and science, and Caroline worked as her brother’s assistant, providing technical support for the telescopes he built. She also was the first woman to be credited as the discoverer a comet (it’s called Comet C/1786 P1) and, after King George III began paying her, the first female scientist to ever be paid for her work. Caroline was awarded a Gold Medal from London’s Royal Astronomical Society and a Gold Medal for Science from Prussia’s King Frederick William IV.

The Wright Siblings

We know that Wilbur and Orville Wright were the inventors of the first successful airplane. But Katharine, the Wright brothers’ youngest sibling, played a huge role in facilitating her brothers’ aviation success. After graduating from Oberlin, Katharine worked as a Latin teacher in Dayton, Ohio. Although she wasn’t an engineer, she frequently corresponded with her brothers when they were in Kitty Hawk, North Carolina, testing airplane prototypes. The brothers bounced ideas off of her, and she gave them emotional support and encouragement when they worried that flight simply wasn’t possible. Katharine also helped run her brothers’ bicycle company, which provided the funds that the brothers used to finance their airplane experiments.

Additionally, Katharine played an integral role in publicizing the Wright Brothers’ success, encouraging them to give speeches and do public flight demonstrations. Katharine even learned French, so she could hobnob with European royalty and aristocracy, spreading the word of her brothers’ aeronautical achievement.

Harriet and Catharine Beecher

Harriet Beecher Stowe’s famous novel Uncle Tom’s Cabin was a landmark piece of work for the anti-slavery movement, but she also had 12 siblings, many of whom also worked tirelessly for causes like abolitionism and women’s suffrage. Catharine, the oldest sibling, was passionate about seeing young girls become educated, and she opened the Hartford Female Seminary in Hartford, Connecticut, in 1824. Working from textbooks she wrote herself, Catharine taught groups of young girls everything from philosophy and art to chemistry and algebra. During her life, she opened schools in Ohio, Wisconsin, Iowa, and Illinois.

The Brontë Sisters

Decades before J.R.R. Tolkien would create Middle-Earth, Charlotte, Emily, and Anne Brontë wrote stories together in childhood that revolved around fantasy worlds with names like Angria and Gondal. After a brief separation when they reached young adulthood, the sisters eventually reunited in 1845, following the death of their aunt Elizabeth, and began writing together once again. The next year, they published a book of poems under pen names titled Poems by Currer, Ellis and Acton Bell. Soon, each sister would write her own defining work: Charlotte published Jane Eyre in 1847, while Emily penned Wuthering Heights the same year, and in 1848, Anne Brontë published The Tenant of Wildfell Hall.

John F. Kennedy and Robert F. Kennedy

John F. Kennedy was President of the United States from 1961 until his death in 1963, but the whole time he was in his office, his brother Robert was close by. Robert served as John’s Attorney General and was also his closest confidante and main advisor during his political career.

John was the second and Robert was the seventh of nine children born to Joseph P. Kennedy Sr. and Rose Fitzgerald Kennedy. They constantly collaborated and handled major political issues like the Cuban Missile Crisis together, and were said to be a source of steadfast support to one another during their entire lives. Tragically, John was assassinated in 1963 and Robert was also assassinated in 1968 in the midst of his own presidential campaign.

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