Jacob Groves Oldaker was born 4 Dec 1843 and died 26 Nov 1906. I don't have a year for his marriage to Margaret Hammer. He was the son of Jacob Groves Oldaker Sr. born 14 March 1809 and died 29 April 1887.He md. Elizabeth Fray 13 Nov 1831. She was of Green County,Penn. She was born 2 Aug 1807 and died 6 Dec 1899. They had 13 children.Please contact me if I can be of further help.