
Herzog von Sachsen-Lauenburg
Ratzeburg Cathedral
Johann IV. (* 18. July 1439 in Ratzeburg; † 15. August 1507 in Ratzeburg) was a herzog von Sachsen-Lauenburg. He was 68 years old. He was married to Dorothea von Brandenburg. He had at least 4 children (3 sons and 1 daughter). He was buried at Ratzeburg Cathedral.