Vagrant was an American Thoroughbred racehorse best known for his 1876 Kentucky Derby win. He was the first of nine geldings to win the Kentucky Derby and was a white-stockinged bay colt sired by Virgil out of the mare Lazy. Virgil was notable for siring successful nineteenth-century race horses and stood at Milton H. Sanford's Preakness Stud in Lexington, Kentucky. Through his sire, Vagrant is related to two other early Kentucky Derby winners, Hindoo (1881) and Ben Ali (1886).

Hindoo (1878–1901) was an outstanding American Thoroughbred race horse who won 30 of his 35 starts, including the Kentucky Derby, the Travers Stakes, and the Clark Handicap. He later sired Preakness Stakes winner Buddhist and Belmont Stakes winner and Leading sire in North America Hanover.