Julie, Hope you are still working on this.Here is what I have.A Peter Reissdorff arrived in Phil. Oct 26 1768 from Rotterdam on the ship Betsey.A Peter was indentured to a Wm. Cox for 2 yrs. 8 m. on Dec 23 1771. This was in Bucks Co.There is a Peter b. 8 Dec 1783 in Berks Co. who was baptized May 30, 1784 at the Christ Church.I think this last Peter is the one who was married to Christine. This Peter & Frederick are probably brothers and sons of the Peter was was the immigrant.There is a Peter Ristorff in Cumberland Co.in 1800 with 2 sons ages 16-26.This Peter is 65 & over. Let me know what you think.