Isaac married STURGIS, Eliza about 1800 in Pennsylvania, USA. Eliza was born about 1781 in Pennsylvania, USA; died before 1826. [Group Sheet] [Family Chart]

1. MARQUISS, Isaac C Jr. was born on 27 Mar 1805 in Pennsylvania, USA; died on 6 Dec 1862 in Peru, Miami, Indiana, USA; was buried in Peru, Miami, Indiana, USA.
2. MARQUISS, Eliza was born on 10 Apr 1802 in Pennsylvania, USA.
3. MARQUISS, Jacob was born about 1802 in Mercer County, Illinois; died before 1861.
4. MARQUISS, John was born on 18 Oct 1803 in Pennsylvania, USA; died on 14 Nov 1870 in Liberty Township, Clarke, Iowa, USA; was buried in Clarke, Iowa, USA.
5. MARQUISS, Andrew was born on 1 Oct 1809 in Ohio, USA; died about 1834.

Isaac married DUNCAN, Abigale on 26 Nov 1826 in Highland, Ohio, USA. Abigale was born in 1794 in Virginia, USA; died between 11 Apr 1873 and 9 Oct 1882 in probably, Pipe Creek Township, Miami County, Ohio. [Group Sheet] [Family Chart]

1. MARQUISS, Lafayette Delmar was born on 26 Aug 1826; died on 31 Mar 1868 in Tippecanoe County, Indiana.
2. MARQUISS, James Washington was born on 18 Nov 1832; died on 16 Sep 1911 in Miami, Indiana, USA; was buried in Rankin Cemetery, Miami County, Indiana.
3. MARQUISS, Spencer E. was born about 1827; died on 22 Apr 1875; was buried in Mays Cemetery, Miami County, Indiana.
4. MARQUISS, Joshua Clinton was born about 1838 in Indiana, USA; died on 14 Sep 1916 in Miami, Indiana, USA; was buried in Rankin Cemetery, Miami County, Indiana.

Isaac married UNKNOWN, Annah about 1801. Annah was born about 1773. [Group Sheet] [Family Chart]

1. MARQUISS, Leah was born on 4 Jul 1808 in Highland, Ohio, USA; died on 1 Oct 1869 in Knoxville, Knox, Illinois, USA; was buried in Knox County, Illinois (Knoxville Cemetery).
2. MARQUISS, Cyrenius was born on 12 Sep 1821 in Highland, Ohio, USA; died on 29 Mar 1857 in Miami, Indiana, USA; was buried in Reyburn Cemetery, Peru, Miami County, Indiana.