

Landgraf von Hessen-Darmstadt (1768-1790)
Ludwig IX. (* 15. December 1719; † 6. April 1790) was a landgraf von Hessen-Darmstadt. He was 70 years old. He was married to Karoline von Pfalz-Zweibrücken. He had at least 5 children (3 sons and 2 daughters).