Scottish and Irish: variant spelling of
Dugan.English (Herefordshire): from a reduced and altered
form of the Welsh personal name Cadwgan (see Cadogan).
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
408,483
Historical Documents & Family Trees with Duggan
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The information for this chart came from the U.S. Immigration Collection at Ancestry.co.uk.
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