This is your cousin Liam son of Teresa Sweeney . i came across your post when i was surfing family history.
I know about our realations to the Murrays , Blains and Kennys from grandmother's side of the family but i cant make any progress on the direct Sweeney family before grandfather ( although i like to think we are related to the historic McSweenys ) . Have you had any luck ?? . long time since we seen each other . I am in Donegal quite a bit ,what about you