Hermann married Mary Niesz on 16 Mar 1862 in Monroe County, Ohio, USA. Mary (daughter of Johannes Wilhelm Nieß Niesz and Christina Karolina Peppel) was born on 11 Jun 1843 in Pittsburgh, Allegheny County, Pennsylvania, USA; died on 22 Jun 1939 in Seneca Township, Monroe County, Ohio, USA; was buried on 28 Jun 1939 in St. John's Middle Church Cemetery, Summit Township, Monroe County, Ohio, USA. [Group Sheet] [Family Chart]

1. Anna Christina Ackerman was born on 19 Sep 1863 in Benwood, Marshall County, West Virginia, USA; died on 1 Mar 1896 in Ohio, USA; was buried in St. John's Middle Church Cemetery, Summit Township, Monroe County, Ohio, USA.
2. John Adam Ackerman was born on 31 Aug 1865 in Wheeling, Ohio County, West Virginia, USA; died on 31 Aug 1949 in Ohio, USA.
3. Henry Frederick Caspar Ackerman was born on 27 Nov 1868 in Wheeling, Ohio County, West Virginia, USA; died on 17 Oct 1960 in Belmont County, Ohio, USA.
4. Mary Catherine Ackerman was born on 13 Jul 1871 in West Virginia, USA; died on 11 Feb 1952 in Monroe County, Ohio, USA.
5. Mathilda Johanna Ackerman was born on 5 May 1873 in Ohio, USA; died in 1931 in Stark County, Ohio, USA.
6. Clara Gertrude Ackerman was born on 14 Dec 1875 in Ohio, USA; died on 10 Jan 1966 in Calais, Seneca Township, Monroe County, Ohio, USA; was buried in Calais Cemetery, Calais, Seneca Township, Monroe County, Ohio, USA.
7. Benjamin Harmon Ackerman was born on 9 Nov 1881 in Monroefield, Malaga Township, Monroe County, Ohio, USA; died on 24 Sep 1956 in West Newton, Washington County, Pennsylvania, USA; was buried on 27 Sep 1956 in Mon Valley Memorial Park, Donora, Washington County, Pennsylvania, USA.