# John IV, Duke of Saxe-Lauenburg

> German duke

**Wikidata**: [Q5132307](https://www.wikidata.org/wiki/Q5132307)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/John_IV,_Duke_of_Saxe-Lauenburg)  
**Source**: https://4ort.xyz/entity/john-iv-duke-of-saxe-lauenburg