Complex sentence: Florence was the daughter of Kate Lupton and Edward, Baron von Schunck, a descendant of Johann Nathanael, Baron von Schunck, who was the Duchy of Württemberg's Ambassador to Great Britain in the early 18th century.
Split into simpler sentences: Florence was the daughter of Kate Lupton and Edward, Baron von Schunck. The British branch of the von Schuncks were descended from Johann Nathanael, the Duchy of Württemberg's Ambassador to Great Britain in the early 18th century.