Johann Caspar Bluntschli was a Swiss jurist and politician. Together with fellow liberals Francis Lieber and Édouard René de Laboulaye, he developed one of the first codes of international law and war.
Johann Kaspar Zeuss was a German historian and founder of Celtic philology. He is credited with demonstrating that the Celtic languages belong to the Indo-European group.
Johann Martin Miller was a German theologian and writer. He is best known for his novel Siegwart, which became one of the most successful books at the time.