This could be *VERY* complicated for Ireland (with the whole Northern Irish thing that’s too political to get into here) but aside from athletes with Irish parentage (or grandparents!) born in the US, GB or Australia there aren’t too many. Ben Fletcher in judo represented in Rio and has switched so he’s noteworthy of those Irish family connections
Rowers Sanita Puspure from (she previously represented them at junior level) and Monika Dukarska from (she has only represented Ireland) have been resident for many years (and moved for economic, not sporting reasons)
Again, avoiding those from Northern Ireland, marathon runner Sinead Diver was born and raised in Ireland and moved to quite late in her career. Dublin born Sailor Saskia Tidey represented Ireland in Rio and switched to for this Olympic cycle
Oh I forgot the Gadirova twins that represent were born in to parents