Patronymic was used by illegitimate royal children who were acknowledged as such by their fathers. The use of "Mac" in some form was prevalent in Scottish Gaelic, Irish and Manx, in all of which it denotes "son". "Mc" is also a frequent anglicisation in both Scotland and Ireland. In Ireland, the forms "Mag" and "M'" are encountered. The prefix "Mac" is used to form a patronym, such as "Mac Coinnich" – or the anglicized 'Mackenzie' – son of Coinneach/Kenneth. The female equivalent of "Mac" is "Nic", condensed from "nighean mhic" (in Scottish Gaelic) or "iníon mhic" (in Irish), both meaning daughter.
Forrestal (surname) Forrestal (surname) Forrestal or Forristal (Irish: Ó Fuireastal), is an old Irish surname common in the southeast of Ireland, namely in the counties of Kilkenny, Wexford and Waterford. The name has been spelled in many different forms, all of which are related to the same family including; O'Forristal, Forrestal, Forristal, Forestal, Forestal, Forrestall, Foristal, and in medieval times, Forstall. Forestell is a variation found in Canada. Also, in Gaelic Irish as Ó Fuireastal (pronounced O'Furristhawl), Mac Fuireastal, and Mac An Choill. The Forristals were rooted in Glenmore parish, County Kilkenny, where they held several castles, some of which were located