 The name of Kasem Sanidvongs na Ayudhya, another minister, indicates that he is related to the royal family, as it is also tradition for far-removed descendants to add "Na Ayudhya" after their surnames.In this case, Sanitwong is the family name of Kasem.Sanitwong itself being the name of Prince Wongsa Dhiraj Snid, a son of King Buddha Loetla Nabhalai, and the subsequent family name for his descendants.