# Berthold

> Duke of Bavaria

**Wikidata**: [Q221328](https://www.wikidata.org/wiki/Q221328)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Berthold,_Duke_of_Bavaria)  
**Source**: https://4ort.xyz/entity/berthold


## References

1. The Peerage
2. Integrated Authority File
3. Freebase Data Dumps. 2013
4. CERL Thesaurus
5. Sejm-Wielki.pl