John Lennon's mother, Julia Lennon, died in a car accident in 1958 when John was 17. His father, Alfred Lennon, died of cancer in 1976.
Paul McCartney's mother, Mary McCartney, died of breast cancer in 1956 when Paul was 14. His father, James McCartney, died in 1976 of a heart attack.
George Harrison's mother, Louise Harrison, died of cancer in 1970. His father, Harold Harrison, died in 1998.
Ringo Starr's mother, Elsie Starkey, died of cancer in 1981. His father, Richard Starkey, died in 1987.