Family name Phrmthong (Phrmthong 
) , worldwide, is a rare surname. The family name Phrmthong is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
Wanni, Wariyaporn, Nattinapon, Phongsiri, Khanittha, Kanokphon, Aitthithep, Sakaoduean, Uthaiwan, Narithep, Kritsada, Kitipong, Sasirinya, Wanphen, Charuai, Somchit, Suphani, Sawanya, Laoong, Dutdao, Phayom, Sophon, Wadchararat, and Phonphawit