Surname Poomjai (Poomjai 
) , around the world, is a very rare cognomen. The last name Poomjai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, Poomjai is the forename as well as the last name.
Insom, Wiboonronnarong, Sengpanich, Slathongin, Chaiyapan, Chaiyapun, Chaivanich, Khuntongdee, Krachangepuch, Promkhong, Phuekphong, Puvanasuksuntorn, Tangsanga, Turasakul, Viriyapap, Intranukul, Chaiyaphum, Rotjanaprateep, Rojanaprateep, Lerttrakoonkarn, Lohaprom, Rotchanaprateep, Leksuntarakorn, Potiwanakul, Manmin, Khanom, Kudidthalert, Polpet, Saeyong, Kusolwong, Raktham, Laopong, Lonjanthuk, Jaiwong, Jengtrakul, Nacaskul, Unsamai, Maneejak, Sornsaenee, Chumporn, Burusapat, Pollawit, Pongsriwat, Phungromphothisomphan, and Prasertcharoensuk