Jacob married Elizabeth FISHER, .1 on 25 Apr 1791 in Rockingham Co., Virginia. Elizabeth (daughter of Cprl. Jacob FISHER, The Elder and Anna Maria MARY SCHIEDECKER) was born on 31 Mar 1775 in Somerset Co., Pennsylvania; died on 31 Mar 1854 in Willowdale (Toronto), York Twp., Ontario; was buried in Cummer Burial Grounds, Willowdale. [Group Sheet] [Family Chart]

1. Elizabeth BETSY CUMMER, DUE was born on 20 Nov 1793 in Philadelphia, Pennsylvania; died on 4 Apr 1881 in Willowdale (Toronto), York Twp., Ontario; was buried on 30 Aug 1860 in Mt. Pleasant Cemetery, Toronto.
2. MARY Ann CUMMER, DUE was born on 26 May 1792 in Lancaster County, Pennsylvania; died on 23 Jun 1869 in Willowdale (Toronto), York Twp., Ontario; was buried in Cummer Burial Grounds, Willowdale.
3. John Henry CUMMER, Esq. was born on 28 Mar 1797 in Newtonbrook, Willowdale (Toronto), Ontario; died on 11 Sep 1868 in Toronto, York Co., Ontario; was buried in Toronto Necropolis Cemetery.
4. Peter CUMMER was born on 10 Sep 1812 in Newtonbrook, Willowdale (Toronto), Ontario; died on 10 Mar 1813 in Newtonbrook, Willowdale (Toronto), Ontario; was buried in Cummer Burial Grounds, Willowdale.
5. Jacob CUMMER, .3 was born in in Willowdale (Toronto), York Twp., Ontario.