# John I, Duke of Cleves

> Duke of Cleves and Count of Mark (1419-1481)

**Wikidata**: [Q570195](https://www.wikidata.org/wiki/Q570195)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/John_I,_Duke_of_Cleves)  
**Source**: https://4ort.xyz/entity/john-i-duke-of-cleves


## References

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