Nettie with daughter Margaretha Christine, known as Marnie, circa 1905.
Margaretha Christine Geisel was the first child born to Theodor Robert Geisel and Henrietta (Nettie) Seuss Geisel. She was named after Nettie’s mother, Margaretha Greim, and Theodor’s mother, Christine Schmaelzle, but the family affectionately called her Marnie.