Question: Who is Dorothea Maria Of Saxe-Gotha-Altenburg's paternal grandmother?
Sentence (from "Ernest I, Duke of Saxe-Gotha"): Ernest I, called "Ernest the Pious" (25 December 1601 – 26 March 1675), was a duke of Saxe-Gotha and Saxe-Altenburg.
Relevant evidence: No