# Eric I, Duke of Brunswick-Grubenhagen

> Duke of the Principality Grubenhagen

**Wikidata**: [Q73452](https://www.wikidata.org/wiki/Q73452)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Eric_I,_Duke_of_Brunswick-Grubenhagen)  
**Source**: https://4ort.xyz/entity/eric-i-duke-of-brunswick-grubenhagen


## References

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