Last name Costigan (Costigan 
, コスティガン) , in all the world, is quite a common family name. The cognomen Costigan is characteristic of Ireland, where it is quite a common surname, Papua New Guinea, where it is quite a rare surname, and Australia. In absolute terms, it most frequently occurs in the United States, Ireland, and Australia.
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| Costigan | Canada, United Kingdom, United States, Ireland, Australia |
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edward a costigan Boston shipbuilder (b. 1819) |
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john costigan Canadian politician, CA (b. 1835) |
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| christopher costigan Irish priest and explorer, IE (b. 1810) |
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| francis costigan American architect, US (b. 1810) |
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mabel cory costigan American social, political, and educational activist, US (b. 1873) |
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edward p. costigan American politician (1874-1939), US (b. 1874) |
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john e. costigan American artist (1888-1972), US (b. 1888) |
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howard costigan American political functionary, US (b. 1904) |
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| joseph charles costigan Joseph Charles Costigan (1871-1926) 1926/27 Obituary [1] Joseph Charles Costigan was born in 1871, and was apprenticed with Belliss and Morcom... (b. 1871) |
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frank costigan Australian lawyer, AU (b. 1931) |
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michael costigan Australian writer (b. 1931) |
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george costigan British actor, GB (b. 1947) |
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michael costigan film producer, US (b. 1950) |
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| frank costigan Australian rules footballer, AU (b. 1902) |
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| giovanni costigan historian (b. 1905) |
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