# Frederick IX, Margrave of Brandenburg

> Margrave of Brandenburg (1588–1611)

**Wikidata**: [Q824250](https://www.wikidata.org/wiki/Q824250)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Frederick_IX,_Margrave_of_Brandenburg)  
**Source**: https://4ort.xyz/entity/frederick-ix-margrave-of-brandenburg


## References

1. The Peerage
2. Virtual International Authority File
3. Freebase Data Dumps. 2013
4. CERL Thesaurus