Robert Edmund Sangster was a British businessman, thoroughbred racehorse owner and breeder. Sangster's horses won 27 European Classics and more than 100 Group One races, including two Epsom Derbys, four Irish Derbys, two French Derbys, three Prix de l'Arc de Triomphes, as well as the Breeders' Cup Mile and the Melbourne Cup. He was British flat racing Champion Owner five times.

The Irish Derby is a Group 1 flat horse race in Ireland open to three-year-old thoroughbred colts and fillies. It is run at the Curragh over a distance of 1 mile and 4 furlongs, and it is scheduled to take place each year in late June or early July.