Finnegan is an anglicized version of the name 'O Fionnagain'. The 'O' means 'son of', and the name 'Fionnagan' itself is a derivative of 'Fionn', which means 'a fair haired person'.
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Finnegan is an anglicized version of the name 'O Fionnagain'. The 'O' means 'son of', and the name 'Fionnagan' itself is a derivative of 'Fionn', which means 'a fair haired person'.