| Children |
| | 1. Margaretha FIRMENICH, b. 6 Jun 1833, Eicks, Nordrhein-Westfalen, Germany , d. Yes, date unknown |
| | 2. Wernerus FIRMENICH, b. 16 Mar 1835, Eicks, Nordrhein-Westfalen, Germany , d. Yes, date unknown |
| | 3. Anna Barbara FIRMENICH, b. 1 Jan 1837, Eicks, Nordrhein-Westfalen, Germany , d. Yes, date unknown |
| > | 4. Mathias Balthazar FIRMENICH, b. Feb 1838, Germany , d. 26 Sep 1931, Ashland, Ashland, Wisconsin, United States  |
| | 5. Johann Bernard FIRMENICH, b. 2 Oct 1839, Eicks, Nordrhein-Westfalen, Germany , d. Yes, date unknown |
| | 6. Elisabeth Maria FIRMENICH, b. 31 Oct 1844, Eicks, Nordrhein-Westfalen, Germany , d. 1926, Brown, Wisconsin, United States  |
| | 7. Charles FIRMENICH, b. Abt 1849, Wisconsin, United States , d. Yes, date unknown |
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