Surname Mcloughlin (Mcloughlin 
) , in all the world, is a common family name. The cognomen Mcloughlin is characteristic of Northern Europe, particularly Ireland, where it is a common surname, Guernsey, where it is quite a common surname, and Isle of Man (explore the name in all countries). Not in comparison with a country's population, it is commonest in the United Kingdom, Ireland, and the United States.
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| Mcloughlin | United Kingdom, Australia, Ireland, United States, Canada |
Loughlin, Macloughlin, Mclaughlin, and Мцлоугхлин
| katherine mcloughlin McLoughlin [nic Lochlainn; married name Norton], Katherine (fl. 1671–1679), Quaker preacher (b. 1671) |
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john mcloughlin founder of the Oregon Country, CA (b. 1784) |
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patrick mcloughlin Influential newspaper editor of the former British Cape Colony, now South Africa, ZA (b. 1835) |
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| john mcloughlin, jr. Metis Chief Trader employed by the Hudson's Bay Company, CA (b. 1812) |
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john t. mcloughlin politician in Massachusetts, US, US (b. 1865) |
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william i. mcloughlin politician in Massachusetts, US, US (b. 1872) |
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maurice mcloughlin US tennis player, US (b. 1890) |
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| joseph james mcloughlin American rower (1878-1962), US (b. 1885) |
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| alfred george m. mcloughlin South African lawyer and botanical collector (1886 - 1960) (b. 1886) |
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| seán mcloughlin Irish nationalist and communist activist (1895-1960), IE (b. 1895) |
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| thomas mcloughlin Irish engineer, IE (b. 1896) |
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tony mcloughlin Irish politician, IE (b. 1949) |
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| thomas edward mcloughlin (1901-1970) (b. 1901) |
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| mary mcloughlin Irish revolutionary (b. 1901) |
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| emmett mcloughlin American priest, public housing advocate, and author (b. 1907) |
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