Surname Sitichai (สิทธิชัย 
, Sitichai 
) , all around the world, is quite a rare cognomen. The last name Sitichai is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname. More prevalently, Sitichai is the forename as well as the last name.
Chai, Jindaluang, Thanosawan, Treanruangsang, Samanmitr, Sripakdee, Chokphiboonkarn, Boonkerng, Boonkeang, Kaewjinda, Kerdmanee, Patnongchoom, Prasopthum, Pimthongchaikul, Rujisaritwong, Jatupornyingyong, Utisanonth, Arunyakanon, Rojanasinrapachai, Chansiripas, Watcharasin, Limrungruengrat, Pueakjarern, Phumchai, Primthongchaikul, Prasitivedchakon, Pomin, Meesan, Sanlin, Saelee, Srioon, Janhom, Sivakul, Seweewullop, Churjai, Boonmee, Sukhanonsawatdi, Khodprom, Juthong, Tansiri, Tibbung, Nunsong, Hnunang, Sriwaurai, Claychan, Kantajiaipin, Kraisaeng, Panyadee, Davilai, and Charoenkajonkul