I know it is a year since your enquiry but my Father, Patrick Joseph McKee, is from Castle Blayney as was his Father, Samuel McKee. My Father was born 1931 or 1932 and my Grandfather was born about 1908-1910. As Castle Blayney is pretty small, I suspect there must be a connection. My father has told me of his grandfather, James McKee who he remembers being known of by his family as 'The Buck' and I guess his date of birth would be at a similar time to the one you have. Hope this helps, please let me know if it does.