It is not among the most common surnames in Ireland, but there would still be a lot of them.
the surname Ryan is most common in County Tipperary
The surname Lacey is an English and Irish (of Norman origin) place name. The surname is widespread in Britain and Ireland, but most common in Nottinghamshire. In Ireland the family is associated particularly with County Limerick.
The most common South American surname in Argentina is Fernandez. In Brazil, the most common surname is Silva. In Chile, the most common surname is Gonzalez.
the surname Morgan comes from Ireland and is a common first middle and sur name
Garcia is the most common Spanish surname.
Garcia is the most common surname in Spain.
The most common Russian surname is Ivanov, derived from the given name Ivan, which means "John" in English. It is estimated that over 5 million people in Russia have this surname.
Thompson is an English name. It means son of Thomas. Most common in northern England and northern Ireland.
It is not an original Irish surname, but it was introduced to Ireland in the 17 century by the Ulster Scots as they fled to Ireland. It is the 23rd most common surname in Ireland mostly found in Ulster as you would expect, but there are Irish Wilsons found in Donegal, Dublin, Wexford, and Waterford.Wilson in Scottish Gaelic is MacUilleim and in Irish Gaelic as Mac Liam.
The surname O'Brien is very common in Ireland so many people that have it can trace themselves back to Ireland if they are not actually from Ireland.
The surname Hurley is of English and Irish origin. Hurley derived from the Irish name, O'Huirthile and is a very common surname in Ireland.