Kat Dennings’s Parents and Siblings. Kat Dennings comes from a warm and loving family. Her dad, Gerald Litwack, is a super smart scientist who studies medicine. Her. Kat’s paternal grandparents were David Litwack/Lytell and Edith Jean Berkman (the daughter of Jacob Berkman and Ada). David and Edith were both raised in. Kat’s maternal grandmother was Ruth Weissman (the daughter of Nathan Weissman and Bertha Liebowitz). Ruth was born in New York. Nathan’s parents were Russian.
Kat’s maternal grandmother was Ruth Weissman (the daughter of Nathan Weissman and Bertha Liebowitz). Ruth was born in New York. Nathan’s parents were Russian.