Derrick Cawthorne (born 24 April 1931) is a British fencer. He competed in the team foil event at the 1964 Summer Olympics. In 1960, he won the foil title at the British Fencing Championships.
His daughter is Hilary Cawthorne. He also has 4 amazing great grandchildren: Susie, Zoe, Christopher and Phoebe. They love him very much.