All around the world, Suyachai (Suyachai , สุยะชัย ) is an extremely rare unknown gender forename. Much more prevalently, Suyachai is the last name as well as the forename.
สุยะใจ
Rossukon, Tanvimon, Waraporn, Woranuch, Supawadee, Chuthamat, and Thawichai