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Cognomen Petkao (Petkao ) , all over the world, is a rare surname. The last name Petkao is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
Panut, Sumalee, Waramon, Siriphan, Auschara, Chutimon, Phongsri, Natthapat, Watcharee, and Natthanicha