Na Ayudhya

Some articles on na ayudhya:

Thai Royal And Noble Titles - Prince's Wife's Title (unless Otherwise Elevated By The Sovereign) - Mom (wife)
... She will use this title to prefix her name and add the word Na Ayudhya to her new surname, for example Mom Srirasmi Mahidol Na Ayudhya (a wife of Chao Fa Maha Vajiralongkorn, whose surname is Mahidol) ... After the birth of HRH Prince Dipangkorn Rasmijoti, Mom Srirasmi Mahidol Na Ayudhya was elevated by King Rama IX to "Phra Ong Chao" rank (i.e ...
Thai Royal And Noble Titles - The 'titled Commoners' - Na Ayudhya
... However, they append the words "Na Ayudhya" (ณ อยุธยา) to their surname, signifying they are descended from a royal blood line ...