My husband also is descended from Mathias/Conrad, Frederick (Also known as YARYAN)Do you have James Weaver's book "The Yearian-Yaryan Family" 1989. He is a Yerion of the 7th generation.Mathias arrived in Philadelphia on or about 11 Oct. 1732 on the "ship, Pleasant, James Morris, master from Rotterdam. The three lists all spell his name differently. JERGON, JARGAN & JURIAN. His age was given as 30. Dean's grandmother was Nancy Catherine Yaryan, dau of John Morgan Yaryan.