Cognomen Hannigan (Hannigan 
, הניגן 
) , globally, is quite a common last name. The family name Hannigan is habitual in Ireland, where it is quite a common surname, Australia, where it is quite a rare surname, and the United Kingdom. Measured by absolute frequency, this name is the most popular in the United States, Ireland, and the United Kingdom.
| teresa hannigan Canadian film editor (b. 1901) |
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| joseph hannigan Irish politician and medical practitioner, IE (b. 1904) |
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dominic hannigan Irish Labour Party politician, IE (b. 1965) |
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robert hannigan Cybersecurity specialist who currently serves as a senior executive of BlueVoyant, a US-based cyber security services company, and as an adviser to a number of international companies. He previously served as the Director of the GCHQ., GB (b. 1965) |
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james hannigan British composer, GB (b. 1971) |
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barbara hannigan Canadian operatic soprano, CA (b. 1971) |
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alyson hannigan American actress and television presenter, US (b. 1974) |
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| james hannigan Roman Catholic bishop (b. 1928) |
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| gord hannigan Canadian ice hockey player, CA (b. 1929) |
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robyn e. hannigan American academic |
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lisa hannigan Irish musician, IE (b. 1981) |
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patrick hannigan American soccer player, US (b. 1982) |
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| johnny hannigan association football player (born 1933), GB (b. 1933) |
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| pat hannigan Canadian ice hockey player (1936-2007), CA (b. 1936) |
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| john hannigan Gaelic footballer, IE (b. 1939) |
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