# Konstantin Ivšín
**Wikidata**: [Q95211781](https://www.wikidata.org/wiki/Q95211781)  
**Source**: https://4ort.xyz/entity/konstantin-iv-n


## References

1. Legie 100
2. Czech National Authority Database
3. BillionGraves
4. Virtual International Authority File
5. Bibliography of the History of the Czech Lands