Question: Who is the maternal grandfather of Ernest I, Duke Of Saxe-Gotha?
Sentence (from "Frederick IV, Duke of Saxe-Gotha-Altenburg"): Altenburg was thereafter ruled by the Duke of Saxe-Hildburghausen, whose dukedom was transferred to Saxe-Meiningen along with Saxe-Saalfeld, which Saxe-Coburg gave up in return for receiving Saxe-Gotha.
Relevant evidence: No