Surname Krengkrai (Krengkrai 
) , in the world, is an extremely rare cognomen. Predominantly, Krengkrai is the forename as well as the last name.
Semwong, Ittiphanyanon, Tantrakool, Pattananiwart, Kitsanaklrus, Wannakhan, Thammarin, Limprapat, Itthipanyanon, Suebsamarn, Dansuwan, Kwanduen, Chotikul, Attachit, Mosikanon, Yakasem, Boonblod, Wattitam, and Teeraprapawong