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| Halforty | rare: S E Derry etc. Ir. Ó h-Ailbheartaigh, ilbheartach, accomplished. Also as Helferty and Hilferty. Woulfe states that it is a Donegal name. SI & SGG. |
| Helferty | rare: Derry etc. See Halferty. |
| Ó h-Ailbheartaigh | Halferty,-orty: annamh, Oir-Dheisceart Dhoire &rl. Brí, b'fhéidir, ilbheartach .i. éirimiúil. Clann a bhain le Tír Conaill, tráth. SI & SGG. |
Parishes where Helferty and a second surname are both baptised.