Surname Sittidej (Sittidej 
) , in the entire world, is a very rare family name. The cognomen Sittidej is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, Sittidej is the forename as well as the last name.
Hatam, Uthaivanichvatana, Pothiapiyanvisut, Kiratibutra, Kaewprasit, Sansomboonsuk, Nuntavisut, Jomjunyong, Pornsaksit, Paitrakulpong, Somprakit, Sittipraneed, Fuangfoo, Thongsuk, Kitiparaporn, Boonsong, Maneerat, Narkviroj, Trivisvavet, Cheuapram, Aomprasert, Memutha, Snansieng, Nincharoen, and Rochanavibhata