# Henry IV the Faithful

> Duke of Żagań

**Wikidata**: [Q573417](https://www.wikidata.org/wiki/Q573417)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Henry_IV_the_Faithful)  
**Source**: https://4ort.xyz/entity/henry-iv-the-faithful


## References

1. The Peerage
2. Integrated Authority File
3. Genealogics
4. [Source](https://www.deutsche-biographie.de/sfz29199.html)
5. Freebase Data Dumps. 2013
6. CERL Thesaurus
7. [Source](https://encyklopedia.pwn.pl/haslo/Henryk-II-IV-Wierny;3911063.html)
8. Sejm-Wielki.pl