Mazu is out of Chatelaine (Flying Spur), who won three races and was five times stakes-placed in Australia, including second in the Gr.2 Silver Shadow Stakes. All five of her foals to race have won, headed by Headway (Charge Forward), champion 2-year-old filly in Australia and winner of the Gr.1 Coolmore Stud S. Her placed daughter Cheyenne Sue (Zizou) is the dam of Let Me Sleep On It (Manhattan Rain), successful in the Listed Redoute's Choice S.

The second dam Midnight Renegade (Brigand) is also the dam of the Listed-placed Late Night Fun (Handy Proverb), grandam of Don't Be Shy (Bradbury's Luck), a Listed winner over jumps.

Third dam Midnight Slipper (Showdown).

The fourth dam Cendrillon (Landau) won the Thousand Guineas and the Futurity Stakes at Caulfield.

Chatelaine has a colt by Toronado born in 2021 and was covered by King's Legacy last spring.