Grimm the Younger, and Christine Elisabeth Heilmann. His mother died when he was three years old and her death struck the family extremely hard.

On February 23, 1783, Grimm married Dorothea Zimmer, with whom he had 8 sons and one daughter. Their children were as follows:

* Friedrich Hermann Georg Grimm (1783-1784)
* Jacob Ludwig Carl Grimm (1785-1863)
* Wilhelm Carl Grimm (1786-1859)
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