Surname Henegan (Henegan 
) , throughout the world, is a rare last name. The cognomen Henegan is habitual in South Africa, where it is a rare surname, Ireland, and the United Kingdom. In absolute terms, it most frequently occurs in the United States, South Africa, and the United Kingdom.
| VARIANT | COUNTRY |
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| Henegan | United Kingdom, South Africa, Australia, Ireland, United States |
| michael henegan Irish police officer, IE (b. 1929) |
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| pat henegan American politician, US (b. 1948) |
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| darrell henegan Canadian taekwondoin and kickboxer, CA (b. 1961) |
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| jermaine henegan college basketball player (1991–1991) Augusta State |
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| patricia henegan researcher (ORCID 0000-0002-5544-2629) |
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| catherina henegan NL |
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