Within the UK and Ireland, the surname Colligan most frequently occurs in Scotland where it is carried by 1 in 17,980 people. The majority of those with the family name of Colligan are to be found living in/around South Lanarkshire (approx. 7% of all UK Colligan's), Glasgow City and North Lanarkshire. The name can also be found in England with 1 in 99,080 people using it, and Ireland with 1 in 268,333.
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