Family name Omjai (Omjai 
) , all around the world, is an extremely rare last name. Much more frequently, Omjai is the forename as well as the last name.
Adam, Innupat, Supamasit, Sonsakun, Petchpan, Nueakaew, Wongkhut, Noulyai, Siriteeppipat, Chaiyasuk, Kongmuang, Pradubkarn, Janthabut, Rungthongbaisuree, Sittichamlong, Sittijamlong, Jagdish, Preecha, Chalard, Adams, Ontor, Onnom, Otklan, Saimek, Strien, Budsri, Kultuan, Golden, Narach, Neuakaew, Sinsorn, Srisong, Changto, Chaisuk, Srikongkaew, and Jeerawattana