The Irish words for 'grandson' are: 'garmhac'(garwok)
or "Ua" which is the word that became the O' in Irish surnames.
The first is more common.
garmhac
In Irish it's "garmhac".ANOTHER ANSWERUa is also Irish Gaelic for Grandson. It's the origin of the Ó on Irish surnames.In Scottish Gaelic ....
The prefix O' seen in Irish surnames is from the Irish (Gaelic) Ó (earlier Ua)which means 'grandson, descendant'.O'Neill in Irish is Ó Néill (descendant of Niall).Grandson or descendant.
In Irish it's "garmhac"
It means grandson or descendant. O'Brien in Irish Gaelic is Ó Briain (descendant of Brian).
It is an Irish surname that means "grandson of the wolf".
In the Irish Ó Néill means "Grandson/descendant of Niall".
O' in Irish surnames is from Ó (grandson,descendant) as in Ó Néill, grandson of Niall or Ó Briain from Brian, etc.
The Ó as in Ó Briain (O'Brien) comes from the older Irish word Ua (grandson, grandchild; descendant).
In Irish names "Mac" means "Son" and "Ó" means "Grandson"
Ó means "grandson" or "descendant". O'Hara is Ó hEadhra in Irish.
mac or mc means son of as in Risteard MacFheorais. Richard son of Pierce. similiarly O' means grandson. Risteard O' Dympsaig. Richard grandson of Dempsey