Question: When did Princess Sophie Of Saxe-Coburg-Saalfeld's father die?
Sentence (from "Francis, Duke of Saxe-Coburg-Saalfeld"): As progenitor of a line of Coburg princes who, in the 19th and 20th centuries, ascended the thrones of several European realms, he is a patrilineal ancestor of, among others, Queen Elizabeth II of the United Kingdom, King Philippe of Belgium and King Simeon II of Bulgaria.
Relevant evidence: No