My family resided in the Philadelphia, Pennsylvania area. My fathers name was Thomas E. Mannix Sr., and his fathers name was Patrick Xavier Mannix. They were married to Betty Messerschmidt and Nellie Wampole respectively. My grandfather was from somewhere in County Cork in Ireland. It has been know that the name Mannix is also known as McMinnick in Ireland. I'm not exactly sure of the spelling of that though. I live in the South Eastern portion of Pennsylvania in a town called Phoenixville. Hope any information helps. Thanks.