mac means "son"
In Irish names "Mac" means "Son" and "Ó" means "Grandson"
It is estimated that about 20% of Irish surnames have a Mac prefix. Mac means son; so Mac Carthaigh would mean 'son of Carthach'.
"Mac' is the Irish word for 'son'; Mac Carthaigh (son of Carthach, MacCarthy).
Mac means son of so MacDonald is son of Donald.
'Son' in Irish is 'mac'.Irish for son is, "mac.""Tá mac agus iníon agam" = "I have a son and a daughter."
'Ap' means 'son of', similar to Irish 'Mac'.
Originally Mac it means 'son' in Scottish Gaelic and Irish.
"Mac" or "Mc" means "son". Found in Irish and Scottish Highland surnames. Mac Néill is "son of Niall".
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
'Irish son' would be 'mac Éireannach' in Irish.
McIntee (Mac an tSaoi) means "son of the wise man / scholar"
An Old Irish name it means "white, bright, fair, handsome".