# Jacob Kettler

> Duke of Courland (1610–1682)

**Wikidata**: [Q313191](https://www.wikidata.org/wiki/Q313191)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Jacob_Kettler)  
**Source**: https://4ort.xyz/entity/jacob-kettler


## References

1. Integrated Authority File
2. The Peerage
3. Find a Grave
4. Freebase Data Dumps. 2013
5. Virtual International Authority File
6. CERL Thesaurus
7. Sejm-Wielki.pl
8. National Library of Israel Names and Subjects Authority File