Last name Loughlin (Loughlin 
, 洛克林, לוקלין 
) , throughout the world, is quite a common surname. The family name Loughlin is characteristic of Ireland, where it is quite a common surname, New Zealand, where it is quite a rare surname, and the United Kingdom. Measured by absolute frequency, it most frequently occurs in the United States, the United Kingdom, and Ireland. Very seldom, Loughlin is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Loughlin | Australia, Canada, Ireland, United Kingdom, United States |
| לוקלין | Israel |
Lachtna, Laflin, Macloughlin, Mcloughlin, O'Loughlin, and Ó Lochlainn
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john loughlin Catholic bishop (1817-1891), US (b. 1817) |
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william hamilton loughlin politician in Massachusetts, US (1847-1877), US (b. 1847) |
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james francis loughlin US (b. 1851) |
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| loughlin o'brien New Zealand politician, NZ (b. 1820) |
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| martin loughlin (1833-1894) mining magnate, speculator and sportsman (b. 1833) |
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clem loughlin Canadian ice hockey player and coach, CA (b. 1892) |
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anne loughlin British activist, GB (b. 1894) |
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wilf loughlin Canadian ice hockey player, US (b. 1896) |
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eduardo mc loughlin Argentinian military personnel, AR (b. 1918) |
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| gerald francis loughlin Chief Geologist of the United States Geological Survey (b. 1880) |
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| peter loughlin Australian politician (1881-1960), AU (b. 1881) |
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| jimmy loughlin association football player, GB (b. 1905) |
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lori loughlin American actress and producer, US (b. 1964) |
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| charles loughlin British politician (1914-1993), GB (b. 1914) |
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irene loughlin Canadian artist, CA (b. 1967) |
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