Surname Arnajak (Arnajak 
) , across the world, is an extremely rare cognomen. Predominantly, Arnajak is the forename as well as the last name.
Sinsap, Pimsal, Intano, Jinoros, Thaimee, Phuphiewduen, Attapreyangkul, Tungchoksongchai, Pattrapakdeekul, Pattrapakdikul, and Wattanakorn