Family name Treanor (トレーナー 
, Treanor 
) , around the globe, is quite a rare cognomen. The last name Treanor is habitual in Ireland, where it is quite a common surname, Isle of Man, where it is quite a rare surname, and Mauritius. Not in comparison with a country's population, it most frequently occurs in the United States, Ireland, and the United Kingdom. Very seldom, Treanor is the forename as well as the last name.
| VARIANT | COUNTRY |
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| トレーナー | Japan |
| Treanor | Australia, Ireland, United States, New Zealand, United Kingdom |
| frank p. treanor American politician (1855-1933), US (b. 1855) |
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| walter emanuel treanor United States federal judge, US (b. 1883) |
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dean treanor American baseball manager and baseball coach, US (b. 1947) |
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noel treanor Irish bishop, NZ (b. 1950) |
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william treanor American lawyer, US (b. 1957) |
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marc treanor British artist specialising in sand art (1963-2020), GB (b. 1963) |
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| patrick treanor British Jesuit and astrophysicist (1920-1978), GB (b. 1920) |
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| walter j. treanor physician, GB (b. 1922) |
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| jack treanor cricketer (1922-1993), AU (b. 1922) |
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matt treanor American baseball player, US (b. 1976) |
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brian treanor |
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| patrick j. treanor American historian (1947-), US (b. 1947) |
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| vincent treanor (born 1961) (b. 1961) |
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| mark treanor Scottish footballer (born 1963), GB (b. 1963) |
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| john treanor (b. 1953) |
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