Frooty, Ireland also had Matt Doyle in the 80s who played in GS main draws (although was born and bred in california) he would gave been the last Irish man in a GS main draw but I'm not sure which year it was.
Oz Open 1985 was the last year Doyle played in a GS.
He reached R16 in US Open in 1882. Current vice-President of the ATP. Should be able to swing some wild cards for the guys if they can boost their rankings this year.
He and Sorensen both played Wimbledon in 1980 but I think Doyle was still officially a yank at that stage...