Because of the pre-emigration marriage of Ed Boyle to Susanna Collins, and subsequent traveling together with 9 other Collins/Callins, any places where Boyle and Collins are in proximity to each other are my highest suspect parishes or areas.
AncestryDNA points to South Donegal; Johngrenham's two-name tools says from Annagry to Glenties, or south of Donegal Town toward Ballyshannon.
Any further was to identify the parish(es) would be helpful.
