Hello, Ken. I hope this finds you well and happy. Actually, there is a McOsker living in Ireland. My brother, Kevin McOsker, moved there about 20 years ago. He's now married and still there with his wife and three kids. Kevin would be a relation of yours (as am I). He's Fergus' g g grandson. Your Charles had a brother, Thomas Victor McO. TV had a son, William Bryan (later William Paul) McO. William was Kevin's grandfather.
-Michael McOsker, San Pedro, CA