I know that three brothers emigrated to the U.S. from a small town in Germany prior to the Revolutionary War. Two were given title to land in Westmoreland County, Penna.(Rumbaugh's Corner(s)) for their service. I was un-aware that one had sided with the Brits and fled to Canada.
I found an Ogilvy in Greensburg, PA. who was my father's (James Audley Rumbaugh)brother.