Family name Itthichai (Itthichai 
) , worldwide, is a very rare cognomen. The surname Itthichai is characteristic of Thailand, where it is an extremely rare surname, and China. Much more frequently, Itthichai is the forename as well as the last name.
Samran, Songcharoen, Phongamphonnan, Chitmankhongkul, Suwanchana, Namwichai, Thammakit, Petchjumnian, Balakanich, Chongkanjana, Sattaphan, Itthikosol, Thureesang, Thianpho, Rattanatranurak, Disavanont, Promchit, Temphithak, Pholsalee, Kittismidh, Seandech, Senarit, Saewong, Saendech, Samkieam, Joijinda, Gingpo, Kaewma, Seedam, Piromnipanant, and Preechawuttipong