Martin and Anna are my 3Great Grandparents. Their son John Frederick, B=6 Aug 1847, D=17 Feb 1918, and M=1869 to Catherine Swab, B=4 Mar 1846, D=1 Nov 1924. They had a son Martin Sylvester, B=10 May 1873 in Sigel, PA. Let me know what info you have or need.