Robinson Families

I am hoping to find some Robinsons whose ancestors have been in Killasandra for many generations. My 3rd great grandfather James Robinson was born in New York state about 1780. I do not know the names of his parents, or when his ancestors went to North America. A professional researcher analyzed the Y-DNA reults of two of my Robinson male cousins, and, based on the ancestral surnames (Darcy, Corrigan, McCann, Donohoe, etc) of their DNA matches, he concluded that my Robinson ancestors came from the borderland area of counties Cavan, Longford and Leitrim. If I succeed in finding any Robinson descendants in this area, I will offer to pay for Y-DNA tests for several of them to see if they match with my cousins.