The mother of XXX is whom?
Sirivannavari Nariratana
Princess Sirivannavari Nariratana (Thai: สิริวัณณวรีนารีรัตน์; Thai pronunciation: (sì.rì.wān.wá(ʔ).riː.nāː.riː.rát); rtgs: Siriwanwarinarirat; born 8 January 1987) is a princess of Thailand and the only daughter of Crown Prince Maha Vajralongkorn and Sujarinee Vivacharawongse (commonly known as Yuvadhida Polpraserth).
Sujarinee Vivacharawongse