| Duncan | numerous: Ulster, N Connacht. Scottish, also sometimes used for Donegan. The Scots name is cognate with Donnchadh meaning "brown lord, warrior". |
| Dunkin | Very rare: Dublin. Ir. Ó Duinnchinn (brown head). A name associated with N Connacht. |
| Ó Duinnchinn | Dunkin, Dinkin: fíor-annamh: Áth Cliath. Aistrithe go Duncan, b'fhéidir. Clann a bhain le Sligeach fadó. Brí: "ceann donn". SGG. |
DEDs where Duncan and a second surname are found together
This list shows total 1901 Duncan households by county.
Click on the county to see detail.
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