# John de Berkeley, 1st Baron Marmion

> Peerage person ID=41777

**Wikidata**: [Q75290466](https://www.wikidata.org/wiki/Q75290466)  
**Source**: https://4ort.xyz/entity/john-de-berkeley-1st-baron-marmion


## References

1. The Peerage
2. Genealogics
3. WikiTree