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Cognomen Painstaking (อุตสาหะ , Painstaking, เพียรกำแหง) , all over the world, is quite a rare family name. The cognomen Painstaking is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname. Much less frequently, Painstaking is the forename as well as the last name.
VARIANT | COUNTRY |
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เพียรสนอง, อุตสาหะ | Thailand |
ทำเพียร, เพียร, เพียรผาสุก, and เพียรวิชา