Donald Manton Llewelyn was a paediatric surgeon at the Prince of Wales Hospital, Sydney. He was born in Sydney on 11 December 1929, the sixth child and fourth son of Arthur Stuart Llewelyn, an insurance executive, and Loys Llewelyn née Bartrim, the daughter of a farmer. He was educated at Roseville Public School, Artarmon Opportunity School and North Sydney Boys’ High School, and then studied medicine at Sydney University. He qualified in 1953. He was a resident medical officer at St George Hospital in Sydney and then in the orthopaedic section of the Royal Children’s Hospital, Melbourne. He was subsequently an orthopaedic registrar at the Royal Melbourne Hospital. He then went to the UK, where he was an orthopaedic registrar at Hammersmith Hospital, London. He gained his FRCS in 1958. On his return to Australia, he joined the staff of the Royal Alexandra Hospital for Children in Sydney and then became an honorary assistant surgeon and paediatric surgeon at the Prince of Wales Hospital, Sydney. He was also medical superintendent of the New South Wales Society for Crippled Children. Outside medicine he farmed, played tennis and golf, and was an artist. In 1954, he married Suzanne Funda. They had four children – Hugh, Linda, Kaye and James – and three grandchildren – Luciano, Bejo and Oola.