William Cyril Marshall DFC SCM (14 August 1918 – 1 November 2005) was a Thoroughbred horse racing trainer and owner who had the distinction of being the only person to have saddled winners from stables on four different continents.
Discharged from the military, Marshall remained in England and began training National Hunt horses then Thoroughbreds for flat racing.
In 1972 a small plane carrying Marshall and his wife Pamela, along with jockey Joe Mercer and racehorse-owner John Howard, crashed after taking off from Newbury Racecourse.
In 1981, the sixty-three-old Marshall and his wife Pamela moved to Barbados where he would become one of the most important figures in that country's horse racing industry.
In all, Marshall won twenty-two Barbadian Triple Crown races and earned champion trainer honors eleven times.