For background on how the map was made (and its flaws), see the relevant blog entry.
|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