Cognomen Lenehan (Lenehan 
) , around the globe, is quite a rare family name. The surname Lenehan is characteristic of Ireland, where it is quite a common surname, Australia, where it is quite a rare surname, and the United Kingdom, where it is a rare surname. Measured by absolute frequency, it is the most numerous in the United States, Australia, and Ireland.
| VARIANT | COUNTRY |
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| Lenehan | United Kingdom, Australia, Ireland, United States, Canada |
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henry alfred lenehan (1843-1908) astronomer, AU (b. 1843) |
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| robert william lenehan (1865-1922) lawyer and soldier (b. 1865) |
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jim lenehan Australian rugby union player, AU (b. 1938) |
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nancy lenehan American actress, US (b. 1953) |
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| joseph lenehan Irish politician, IE (b. 1916) |
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| susan lenehan Australian politician, AU (b. 1943) |
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| john lenehan British pianist, GB (b. 1958) |
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| patrick lenehan boxer |
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| peter lenehan Peerage person ID=351429 |
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| richard lenehan Peerage person ID=351428 |
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| sonia m lenehan researcher |
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| claire e. lenehan researcher |
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| andrew lenehan Australian cabinetmaker, ca. 1805-1886 |
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| ciarán lenehan Gaelic footballer, IE |
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| pat lenehan college basketball player (2013–2015) Connecticut |
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