Question: What nationality is Duchess Charlotte Frederica Of Mecklenburg-Schwerin's father?
Sentence (from "Frederick Francis I, Grand Duke of Mecklenburg-Schwerin"): Frederick Francis I (10 December 1756 – 1 February 1837) ruled over the German state of Mecklenburg-Schwerin, first as duke (1785–1815), and then as grand duke (1815–1837).
Relevant evidence: Yes