Kameko is out of Sweeter Still (Rock of Gibraltar), who finished fourth on her only start in Ireland before racing in the US, where she won the Grade 3 Senorita Stakes and was placed in the Providencia Stakes and the Honeymoon Handicap, both then Grade 2 races. She is a half-sister to Kingsbarns (Galileo), winner of the Gr.1 Racing Post Trophy, and to Belle Artiste (Namid), who won the Gr.3 Derrinstown Stud 1000 Guineas Trial Stakes.

Second dam Beltisaal (Belmez).

Third dam Ittisaal (Caerleon).

This is the family of Ace (Danehill), second in the Grade 1 Breeders' Cup Turf, Danish, winner of the Grade 1 Queen Elizabeth II Challenge Cup, and Hawkeye, a three-time runner-up at Group 1 level.

Sweeter Still has a two-year-old filly by Big Blue Kitten and a yearling filly by Optimizer.