Surname Natthajak (Natthajak 
) , in the entire world, is an extremely rare cognomen. Predominantly, Natthajak is the forename as well as the last name.
Sainoy, Riwdaeng, Yoorong, Chancham, Phangrak, Wongkham, Yangkhiaosod, Supphasivasitt, Rungchaiporn, Wannasinsunthorn, and Ratchatasuwiroj