I think we may be looking for the same family. I am looking for the parents of Catherine Doub who married Joseph Bowlus in 1828 also in Fred. Cty. MD. She may be sister of Joel Doub who married Mary Schlosser and lived in Cavetown MD. I know I have come across the name Poffenberger in my research, but can't put my hands on it right now.Another brother may have been Ezra Doub, 1808-1881, buried in Frederick, MD.Do any of these names mean anything to you?I'll let you know if I find the Poffenberger info.