Cognomen Morahan (Morahan 
) , around the globe, is a rare family name. The surname Morahan is habitual in Ireland, where it is quite a rare surname, Australia, where it is a rare surname, and New Zealand. In absolute terms, this name is the most popular in the United States, Australia, and Ireland. Much less frequently, Morahan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Morahan | United Kingdom, Australia, Ireland, United States, New Zealand |
| eugene morahan sculptor, US (b. 1869) |
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christopher morahan English stage and television director (1929-2017), GB (b. 1929) |
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| jim morahan art director, GB (b. 1902) |
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| tom morahan British art director, production manager, and film producer (1906-1969), GB (b. 1906) |
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hattie morahan British actress, GB (b. 1978) |
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| thomas morahan American politician, US (b. 1931) |
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luke morahan Australian rugby union player, AU (b. 1990) |
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| andy morahan British director, GB (b. 1958) |
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| caroline morahan Irish actress, IE (b. 1977) |
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| joe morahan college basketball player (1969–1970) Virginia |
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| heidi morahan researcher (ORCID 0000-0003-2469-1566) |
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