Surname Phatchaya (พัชยา 
, พัชญา , Phatchaya ) , across the world, is an extremely rare family name. The cognomen Phatchaya is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, Phatchaya is the forename as well as the last name.
Kolb, Poenmankhong, Phomchai, Phusawat, Rodroungchaiyasin, Rodpuangchaiyasin, Rungtong, Monpaneewong, Saisawang, Somakettarin, Phisithanawong, Wangnaikul, Borirakthanakul, Rattanachu, Tanachaiaree, Nakhirunkanok, Nittayasut, Seelacharoen, Chuangchote, Phutthakamnoet, Rungjaroentham, Theeramaneepanya, Kanjantuek, Sopolsittipong, Surivong, Noulsri, Nalou, Chanta, Kansut, Kayaiwong, Pathan, Deacha, Dampin, Numnan, Halang, Maneeon, Jirakittayakon, Bachaku, Borisut, Kuchita, Penglay, Promsri, Pholperm, Rodpuongchaiyasin, Rodpoungchaiyasin, Robloke, Janyang, Nimnual, Boulton, and Jittraphantavee