- 1747–92, emperor of the Holy Roman Empire 1790–92 (son of Francis I; brother of Joseph II and Marie Antoinette).
- 1835–1909, king of Belgium 1865–1909 (son of Leopold I of Belgium).
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 1747–92, Holy Roman Emperor (1790–92). He formed an alliance with Prussia against France (1792) after the downfall of his brother-in-law Louis XVI
- 1835–1909, king of the Belgians (1865–1909); son of Leopold I. He financed Stanley's explorations in Africa, becoming first sovereign of the Congo Free State (1885)