Pleasant Colony
Pleasant Colony won the 1981 Kentucky Derby with Jockey Jose Velasquez.
Giacomo won the Kentucky Derby in 2005.
Horse 'Secretariat' won the Derby in 1973.
The 1981 Derby winner, 'Pleasant Colony', was owned by Buckland Farms, and was trained by John P. Campo.
A horse named Thunder Gulch won the Kentucky Derby in 1995.
Giacomo won the 2005 Kentucky Derby. He won with odds of 50-1.
The Kentucky Derby did not begin until 1875.
Whirlaway. He was the fifth Triple Crown winner
The 14th Kentucky Derby was run in 1888 and won by MacBeth II.
If you are talking about the Kentucky Derby, the horse was Jet Pilot.
A horse named Elwood won the thirtieth Kentucky Derby in 1904. Elwood was the first horse bred and owned by a woman to win the Derby.
I will assume by "derby" you mean Kentucky Derby. In 1984 the winning horse in the Kentucky Derby was Swale, who was a son of Seattle Slew, the 1977 Triple Crown winner. Swale lost the Preakness, finishing 7th, but came back to win the Belmont Stakes 3 weeks later.