# John I, Duke of Brittany

> French duke

**Wikidata**: [Q381851](https://www.wikidata.org/wiki/Q381851)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/John_I,_Duke_of_Brittany)  
**Source**: https://4ort.xyz/entity/john-i-duke-of-brittany


## References

1. Freebase Data Dumps. 2013
2. CERL Thesaurus
3. Sejm-Wielki.pl