Surname ธชัย (Thachai 
, ธชัย ) , all around the world, is a rare family name. The family name ธชัย is characteristic of Thailand, where it is a rare surname, and Israel, where it is a very rare surname. Much less frequently, ธชัย is the forename as well as the last name.
ศรีศิริ, and ปราณีตพลกรัง