Cognomen Haggarty (Haggarty 
) , in all the world, is quite a rare family name. The surname Haggarty is habitual in Australia, where it is quite a rare surname, Canada, where it is a rare surname, and the United Kingdom. In absolute terms, the name is most common in the United Kingdom, the United States, and Canada.
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| Haggarty | Australia, Canada, New Zealand, United Kingdom, United States |
| george haggarty American basketball player (1902-1971), US (b. 1902) |
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| james haggarty ice hockey player, CA (b. 1914) |
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| ben haggarty British author, GB (b. 1958) |
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| gary haggarty former leader of an Ulster Volunteer Force unit and supergrass (b. 1973) |
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| john m haggarty researcher |
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| connor j haggarty researcher (ORCID 0000-0001-6678-0570) |
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| jim haggarty college basketball player (1972–1973) La Salle |
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| sarah haggarty Academic at the University of Cambridge |
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| bernard haggarty researcher |
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| george haggarty archaeologist |
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| matthew haggarty college basketball player (2000–2000) Albany (NY) |
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| stephen j haggarty researcher |
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| john haggarty |
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| matt haggarty English rugby league footballer, GB (b. 1991) |
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