Last name Galligan (Galligan 
) , worldwide, is quite a common surname. The cognomen Galligan is habitual in Ireland, where it is quite a common surname, Malta, where it is quite a rare surname, and Australia. Measured by absolute frequency, this name is the most popular in the United States, Ireland, and the United Kingdom.
| VARIANT | COUNTRY |
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| Galligan | Australia, Ireland, Canada, United States, United Kingdom |
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john henry galligan politician in Massachusetts, US (1851-1893), US (b. 1851) |
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paul galligan Irish politician (1888-1966), IE (b. 1888) |
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claire galligan American freestyle swimmer, US (b. 1895) |
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| pete galligan American baseball player, US (b. 1860) |
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| john galligan American baseball player, US (b. 1865) |
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| peter f. galligan (b. 1860) |
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walter t. galligan United States general, US (b. 1925) |
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| tom galligan American cinematographer (b. 1891) |
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zach galligan American actor, US (b. 1964) |
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roseanne galligan Irish athletics competitor, IE (b. 1987) |
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yvonne galligan |
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danielle galligan Irish actor, IE (b. 1992) |
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| tom galligan American politician and businessman, US (b. 1946) |
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| tom galligan American academic administrator, US (b. 1955) |
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| brian galligan (b. 1945) |
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