Last name Tester (Testa 
, Tester , テスター 
) , globally, is a common surname. The surname Tester is habitual in Monaco, where it is quite a common surname, Italy, and Malta (explore the name in all countries). In absolute terms, it is the most numerous in Italy, the United States, and Argentina. Much less frequently, Tester is the forename as well as the last name.
| peter tester US (b. 1811) |
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| christian tester CH (b. 1815) |
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| john tester 19th century American politician, US (b. 1835) |
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| christian tester Swiss theologian (1850-1918), CH (b. 1850) |
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ruth tester American singer-dancer, US (b. 1903) |
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| william tester English cricketer (1857-1890), GB (b. 1857) |
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| scan tester English folk musician, GB (b. 1886) |
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| jefferson tester American artist, 1899-1972 (b. 1899) |
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| ralph tester British codebreaker, GB (b. 1901) |
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| h. e. tester Danish chemist and philatelist (b. 1905) |
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| arthur tester DE (b. 1895) |
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jon tester American farmer and politician (born 1956), US (b. 1956) |
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| desmond tester British actor, AU (b. 1919) |
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andrew tester archaeologist |
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| jefferson w. tester Jefferson Tester is a professor of sustainable energy systems in the Smith School of Chemical and Biomolecular Engineering at Cornell University. He also serves as principal scientist for Cornell's Earth Source Heat project., US (b. 1945) |
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