To learn about the origins of your surname check out this website, The Internet Surname Database.
My surname is Carroll.
There were six distinct septs of O'Carroll in Ireland, namely in Counties Kerry, Offaly, Monaghan, Tipperary, Leitrim and Louth. Carroll has a high position in the list of most numerous surnames in Ireland, approximately sixteen thousand, which range from Counties Cork, Tipperary and Waterford, to Kilkenny.
My given name Louise also means warrior so I guess you could say that I am someone not to be messed with.