Last name Rithichai (Rithichai 
) , across the world, is a very rare family name. The last name Rithichai is characteristic of Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. More prevalently, Rithichai is the forename as well as the last name.
Samoyi, Wunsiri, Saewong, Sowarit, Chutraphichai, Piewkham, Phothisuk, Chaisingharn, and Kaewvicheara