Does anyone know the history of the surname "Degnan"? Thanks.
Tags:  Degnan
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Irish: variant of > Deignan.
Irish (Roscommon): reduced Anglicized form of Gaelic Ó Duibhgeannáin ‘descendant of Duibhgeannán’, a diminutive of Duibhgeann (see > Deegan).
Irish: Anglicized form of Gaelic Ó Duibhginn ‘descendant of Duibhgeann’, a byname from dubh ‘black’ + ceann ‘head’, ‘chief’

(Dictionary of American Family Names, Oxford University Press)
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