Fiona Goode was born in 1954 in New York City. The tenth generation of the line of witches that fled Salem in 1692, Fiona manifested her power in the spring of 1969, upon which she was sent to stay at Miss Robichaux's. When Fiona was 17, the sudden death of the Supreme before her, Anna-Leigh Leighton, resulted in Fiona proving herself to be the coven’s next Supreme. For most of her life, Fiona traveled the world, seeing and learning as much as she could. She led a glamorous life, showcasing the high points that witches in the height of their power could achieve. She had one daughter, Cordelia, in 1985. In late 2012, Fiona’s powers began to weaken slightly, signaling the rise of a new Supreme. Fiona died in 2013 of unknown causes, leaving her daughter Cordelia to prove herself as the new Supreme (americanhorrorstory.wikia.com).
Anna-Leigh Leighton was born in 1911 to a dignified family in New Orleans, Louisiana. Clearly a very gifted witch, Anna-Leigh became the Supreme of Miss Robichaux's Academy in 1940, taking over from Mimi DeLongpre when she was 29 years old. Anna-Leigh was a very dignified woman, always holding herself as a fine example of how dignified witches should carry themselves in society. In 1970, her health began to decline, and in the spring of 1971 she died suddenly. According to her will, her successor, Fiona Goode, tried and succeeded performing the Seven Wonders, becoming the next Supreme (americanhorrorstory.wikia.com).
Endnotes: In American Horror Story: Coven, the history of the Supremes is very important when you consider why the witches behave the way that they do. The Supremes lead the coven, and the line of Supremes goes back to when the coven was fleeing Salem during the Witch Trials. For this page, I mostly used americanhorrorstory.wiki.com and the show itself. I embellished some parts, and filled in a lot of blanks, but these biographies follow the canon of the show to the best of my ability.