# John IV, Duke of Mecklenburg

> Duke (1384-1395) of Mecklenburg

**Wikidata**: [Q66901](https://www.wikidata.org/wiki/Q66901)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/John_IV,_Duke_of_Mecklenburg)  
**Source**: https://4ort.xyz/entity/john-iv-duke-of-mecklenburg


## References

1. The Peerage
2. Catalog of the German National Library
3. Virtual International Authority File
4. Freebase Data Dumps. 2013
5. CERL Thesaurus
6. Sejm-Wielki.pl