Cognomen Fahsai (Fahsai 
) , all around the world, is an extremely rare surname. The last name Fahsai is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more frequently, Fahsai is the forename as well as the last name.
Ka, Intharak, Saengkham, Supasitkul, Klongkhayan, Phawichaichok, Putamanonda, Plongkerd, Janjamsai, Ngamtrairai, Nooprasit, Heamarath, Sombatthai, Khaengkhayan, Punyashthiti, Tangsuntornwiwat, Siriwattakanon, Suwannachat, Chaipraditgul, Borvornsirikaseam, Pawapootanont, Wisankanjana, Natnicha, Plaichan, Piamkhum, Prada, Narak, Baibua, Pramon, Pinnam, Little, Hirase, Sinthip, Apairat, Khamupala, Poonpun, Ruofeng, Jensaiklang, Thattuk, Nakarin, Nongqai, Makkanuphap, Summaarriyamak, Seakhouy, Srikajorn, Chinwong, Disayabutra, and Suksawasdi Na Ayutthaya