 Tristan ’ s sire Hermit won the Epsom Derby in 1867 and became an outstandingly successful stallion , being Champion Sire for seven successive years . In addition to Tristan , he sired the Derby winners Shotover and St. Blaise , as well as St. Marguerite ( 1000 Guineas ) , Lonely ( Oaks ) , and Thebais ( 1000 Guineas & Oaks ) . Tristan 's dam Thrift was an influential broodmare whose direct descendants included the Australian champion Poseidon , the Kentucky Derby winner George Smith and the Epsom Derby winner Reference Point . 
