Cognomen Somrutai (Somrutai 
) , worldwide, is an extremely rare family name. The family name Somrutai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much more frequently, Somrutai is the forename as well as the last name.
May, Rodraksa, Reantragoon, Jitreepit, Jitpukdeebodintra, Thasanacharoen, Hannaruchai, Yunsungnoen, Sukonthorn, Supanaphiw, Songkomon, Chompatong, Boonsinui, Kaewbuppha, Pongnawin, Teerasumran, Tippawong, Nakcharoen, Visutarumney, Sadsanapuckdee, Bunyapongpan, Prasongsuk, Pumsrichai, Phromkua, Bunamnart, Boonsook, Sangma, Chusri, Pongam, Jantad, Jaizue, Niamto, Iawlek, Uarkittikul, Manakul, Meemusor, Prakobphol, Sontung, Kankaew, Kongfua, Klomjit, Jaronrum, Taochan, Touyrakdee, Noikaew, Muanglay, Saisanun, Sena Art, Bangkam, and Pisaisawad