Also aboard were George's eldest brother Stephen (24 June 1933 – 1989) and his wife and two sons, one of whom was Stevie Young, who later joined AC/DC to replace his uncle, Malcolm Young), his only sister, Mrs Margaret Horsburgh (2 May 1935 – 2019) and her husband and son, and brother, William Jr (born 15 December 1940) and his wife. Another elder brother, Alex (28 December 1938 – 4 August 1997), stayed in the UK, and was later a member of London-based group Grapefruit. A final brother, John Young (born 17 May 1937), had migrated to Australia separately. Malcolm later described the family's musical background: "All the males in our family played, Stevie, the oldest played accordion, Alex and John were the first couple to play guitar, and being older it was sort of passed down to George, then myself, then Angus."