 Although he was a top-class sire of middle-and-long distance horses, including Relkino, Give Thanks, Olwyn, Floyd and Lanfranco, he had little success as a sire of sires.Of his daughters, My Sierra Leone produced the Champion filly Royal Heroine who won the inaugural running of the Breeders' Cup Mile in North American record time.Relko died on 30 March 1982 and was buried at the Malthouse Stud in Berkshire.