Quinns in Drumhome

Hello Everyone.

About six years ago I posted looking for my great great grandmother and her family somehwere in Donegal and Roger very kindly found me a Henry Quinn in Shannah, Drumhome Parish on Griffith's Valuation. 

Progress has been achingly slow, but with the help of an Ancestry.com DNA test on an older family member we were able to discover that A. We have genetic roots in Inishowen and that B. A number of our matches are convinced, rightly or wrongly, that we are descended from Henry Quinn whose father was possibly a Hugh Quinn.who listed himself as born in Lagey on his naturalization documents.

There is a Hugh renting a Mountain in Shannah as well as Henry renting a house, office and land.  What this does or does not mean I don't yet know.

What I am trying to find out is if there are RC church records for the area, Also, whether this parish is considered part of Inishowen.  If not, I am wondering if I should go looking for my Quigleys up there, as nothing so far has given me any hope of ever finding them except that my James probably born around 1810-11 was married to a Margaret Harkins, so perhaps if I find Quigleys and Harkinses in close proximity that is a place to look.

Of course my Quinns could have just wandereed around, and the Quigleys could be from anywhere, and I am open to suggestions.  I know three James Quigleys were found for me but I have not managed to get any further with that, either.

Any help, from anyone, would be most kindly received.