Were The Craguns A Scottish Clan?

The more research I do about the Irish Cragun genealogy, the more I realize they might have began their clan in Scotland. That too is a beautiful Country. Enjoy this slide show about Scotland.

And the big mystery, how did they spell Cragun? Chreagan, Creghan, Cragan, Mccreagan, Mc Chreagan, Mc Creaghan, Creggan, Craghan, Croghan, Creggan, Cregghin, Cregan, Creagan, or any other way other than how our family has spelled it since Elisha Cragun.