Cognomen Sookjai (Sookjai 
) , all over the world, is a rare surname. The family name Sookjai is habitual in Thailand, where it is a rare surname, the United States, where it is an extremely rare surname, and Philippines. Much less frequently, Sookjai is the forename as well as the last name.
Piya, Korarak, Potjana, Darinee, Julaluk, Warunee, Wittaya, Wiparat, Woragun, Maneerat, Mingkwan, Sirintra, Benjawan, Penprapa, Phanthip, Jatuphoom, Thanasin, Chanutapa, Chichapak, Jureeporn, Chamaiporn, Preeyaporn, Srisuda, Soisunee, Soysiri, Somkait, Renu, Udom, Ubon, Maria, Soyfa, Alisa, Akino, Koong, Peter, Prach, Thanachart, Narin, Winai, Macren, Samorn, Angela, Apinun, Apiwat, Pairat, Pajone, Samdaye, Sirinee, Vilai, and Wissanuphong