Mother of Dragons
A Clash of Kings
A Dance with Dragons
Daenerys uses "Mother of Dragons" as part of her style.
All kneel for Daenerys Stormborn, the Unburnt, Queen of Meereen, Queen of the Andals and the Rhoynar and the First Men, Khaleesi of Great Grass Sea, Breaker of Shackles, and Mother of Dragons.