Coroebus is the first winner out of First Victory (Teofilo), a Group winner in England in the Gr.3 Oh So Sharp Stakes. She is a half-sister to five stakes winners, headed by Thunder Snow (Helmet), who won the Gr.1 Dubai World Cup twice as well as the Gr.1 Prix Jean Prat and the Gr.1 Critérium International. The others include Ihtimal (Shamardal), winner of the Gr.2 May Hill Stakes and third in the Gr.1 1000 Guineas, her full sister Winter Lightning, winner of the Listed UAE 1000 Guineas, and Always Smile (Cape Cross), who took the Listed Hambleton Stakes and was second in the Gr.1 Sun Chariot Stakes.

Second dam Eastern Joy (Dubai Destination) won in France and has produced six winners besides First Victory.

Third dam Red Slippers (Nureyev) won the Sun Chariot Stakes, then a Group 2. She is the dam of West Wind (Machiavellian), winner of the Gr.1 Prix de Diane and dam of Setting Sail, a Group 3 winner in Australia, of the Listed winner Redbridge (Alleged), the Listed-winning hurdler Gran Maestro (Medicean) and the French winner Hometime (Dubai Destination), dam of Sunchart, second in the Gr.3 Saval Beg Stakes.

First Victory has an unraced two-year-old colt by Shamardal named Pherenikos and a filly foal by Kingman.