The gaelic name for Scots pine (Pinus sylvestris  L) is Gius but Octac is also mentioned. Both names are rare in Irish place names but common in Scotland.  It is believed the Scots pine died out in Ireland around 1500 years ago and in time it was reintroduced from Scotland, thus the reason we now call it Scots pine!
Please read the following article to find out more about the rediscovered NATIVE Gius!