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Across the world, Thammachai (ธรรมชัย , ธรรมไชย , Thammachai ) is a very rare predominantly boy's, but very infrequently feminine given name. The given name Thammachai is characteristic of South-eastern Asia, particularly Thailand, where it is a rare predominantly boy's, but very seldom female name. More frequently, Thammachai is the last name as well as the forename.
Lai, Pakamas, Prasert, Preecha, Phunpikul, Rangsan, Rujirek, Gaywarin, Narawan, Nonglak, Orathai, Yathida, Maneerat, Siriporn, Suradech, Anchalee, Chanchai, Chankham, Chanjira, Benjamas, Kanchana, Kwanchai, Panatda, Bhimmawajna, Chaiwat, Ajchamon, Tom, Malee, Suwan, Vasin, Orasa, Monton, Somjai, Arissa, Apisek, Deriya, Patiphon, Dakham, Thanat, Nischa, Onrunchana, Yadapa, Mongkon, Saisuda, Sinthai, Sommitch, Somphon, Somchat, Jidapa, and Panichar