My maternal grandmother was Mabel Evelyn Cora (by birth). She was born around 1909, and eventually married Ernst Koenig, taking his last name. Ernst was born in Germany, but I've been led to believe that Mabel was born in the United States. Unfortunatley, I have almost no other information regarding Mabel (e.g., siblings, parents). She did rear three children with Ernst: Ruth, Manfred, and Audrey. She died in the late 1960s.