Billie Eilish’s full name is Billie Eilish Pirate Baird O'Connell. Her middle name, 'Pirate,' was actually intended to be her first name by her older brother Finneas. When she was born, her parents decided to keep it as one of her middle names. Eilish began writing songs at age 11 and rose to fame in 2015 with the song 'Ocean Eyes,' which was written and produced by Finneas and originally intended for his own band. Her debut album, 'When We All Fall Asleep, Where Do We Go?' made her the youngest person and first female artist to win the four main Grammy categories (Best New Artist, Record of the Year, Song of the Year, and Album of the Year) in the same year. She is also the first artist born in the 21st century to have a number-one album on the Billboard 200.