# John Fredrik Hammarberg
**Wikidata**: [Q122921363](https://www.wikidata.org/wiki/Q122921363)  
**Source**: https://4ort.xyz/entity/john-fredrik-hammarberg


## References

1. [Swedish church birth records](https://sok.riksarkivet.se/bildvisning/C0033665_00101#?c=&m=&s=&cv=100&xywh=811%2C2548%2C2254%2C1619)