Help, I'm confused on whether the Glacken family originated in Donegal (the city?)or County Donegal. I have been trying to find the branch of Glacken that settled in Emmitsburg, MD in the mid or early 1800's. My grandfather was John Glacken the illegitimate son of a James Glacken. Any early history on the Glacken family would be greatly appreciated. I was also told that originally the spelling was O'Glasian. Is this true?