Cognomen Hannegan (Hannegan 
) , in all the world, is a rare family name. The last name Hannegan is characteristic of the United States, where it is a rare surname, Canada, where it is a very rare surname, and Brazil, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Hannegan | Canada, Brazil, United States |
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edward a. hannegan American politician (1807-1859), US (b. 1807) |
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robert e. hannegan American politician (1903-1949), US (b. 1903) |
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| bryan hannegan American CEO, US (b. 1953) |
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| tom hannegan American businessman and politician from Missouri, US |
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| bryan hannegan researcher |
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| john hannegan researcher (ORCID 0000-0002-4186-4505) |
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| nan hannegan |
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