Surname Holohan (Holohan 
, هولان) , in the world, is quite a rare last name. The cognomen Holohan is characteristic of Ireland, where it is quite a common surname, Australia, where it is a rare surname, and the United Kingdom. Not in comparison with a country's population, it is the most numerous in Ireland, the United States, and the United Kingdom.
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| Holohan | United Kingdom, Australia, Ireland, United States, Canada |
| ambrose wheeler holohan (b. 1836) |
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| richard holohan Irish politician (b. 1882) |
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| john holohan Irish hurler, IE (b. 1891) |
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thomas p. holohan American firefighter (FDNY), first responder and victim of the September 11 attacks, US (b. 1965) |
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| william a. holohan American judge, US (b. 1928) |
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liam holohan British bicycle racer, GB (b. 1988) |
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patrick holohan Irish martial artist, IE (b. 1988) |
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| gerald holohan Australian priest, AU (b. 1947) |
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| gerard holohan Australian Roman Catholic bishop (b. 1947) |
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| michael holohan Irish composer, IE (b. 1956) |
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| daithí holohan Irish painter, IE (b. 1956) |
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| frank holohan Irish hurler, IE (b. 1957) |
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| pete holohan American football player, US (b. 1959) |
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| polly holohan Irish equestrian (b. 1959) |
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| mairead holohan IE (b. 1957) |
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