Surname Poonsook (Poonsook 
) , all over the world, is a very rare cognomen. The family name Poonsook is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, Poonsook is the forename as well as the last name.
Rege, Petcharamuk, Panitthanakom, Sitthichai, Sathaworawong, Tongpanung, Thongsien, Rybarczyk, Keelapang, Chotkovit, Tanaphat, Tanasook, Veeraprasert, Rakmanusa, Brainangkul, Srinawama, Setsoponkul, Shuaytong, Saiyarin, Musiklad, Intiya, Inthep, Janpen, Weiss, Ochum, Khonglee, and Karnchanapee