Julian Lennon is his half-brother, and Kyoko Chan Cox is his half-sister.
After Sean's birth, John became a househusband, caring for his young son until John's murder on December 8, 1980.
Sean Lennon was born in New York City on October 9, 1975, his father's 35th birthday.
He is of English and Irish descent on his father's side, and Japanese descent on his mother's side.
in 1996, Cibo Matto contributed "Águas De Março (Waters of March)" to the AIDS benefit album Silencio=Muerte: Red Hot Latin produced by the Red Hot Organization.