All of the info that I have says that the Peerys were Scotts-Irish. They were of scottish descent and moved in whole communities over to Ireland in Scotts-Irish communities.
The John Peery from Tipperary was the progenitor of the Virginia Peerys as well as some New England lineages too according to all of my info.
This does not rule out though that John Peerys ancestors may also have been in Whales prior to Ireland as Marvin McComb suggests, but I do not believe from what I've seen that they sailed from Whales.
I do know that before they were in Ireland, they were in Scotland of course, and before that were in France and were French Hugonauts.They were also in Italy prior to France and were apparently nobility in all of these countries.
Judging by their migration from Italy, to France, to Scotland, and Ireland, I don't doubt the possibility of them being in Whales at some point as well.
There were also Peerys in England as well so they did get around.
As for the spelling of the name, from all I've seen, I believe that they were semi illiterate, even though apparently wealthy, and of nobility, and the various name spellings are simply the results of not being able to spell very well.They spelled the name however they thought it should be spelled at the time.
I have seen documents on several early american Peerys where the same individual spelled his own name several different ways at different times in his life.
George Peery of Botetourt County, Va., formerly of Augusta County, Va., and brother of Thomas Peery I spelled his own name Peery, Perry, and Pirie at various times in his life.