I would try researching your father using ancestry.com
You do have to pay for it, but check your local library. Many libraries have a library version of the Ancestry database (available only in the branches) you could use.
Or maybe you could search through the postings here. I've seen plenty of posts for a Feeney family from Ontario that branched out into New York. Personally, my Feeney family is from Ontario. There is also quite a bit of information on the Feenys from Sligo county.
If you have any questions or would like any help in your research, feel free to email me. :) germantiger @ gmail . com