|Arkins||rare: Dublin, Clare, Galway. Ir. Ó h-Orcáin. MacLysacht considers it separate from Harkins in Ulster.|
|Harkin||numerous: Derry-Donegal & Ulster generally; also Midlands. Ir. Ó h-Earcáin, earc, red. They were erenaghs in Inishowen (Donegal). A similar English name exists.MIF.|
|Ó h-Earcáin||Harkin: líonmhar: Doire & Tír Chonaill. Brí: earc = ainmhí nó, b'fhéidir, abhac.|
Parishes where Harken and a second surname are found together
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