# Johan Herman Coolhaas
**Wikidata**: [Q130220664](https://www.wikidata.org/wiki/Q130220664)  
**Source**: https://4ort.xyz/entity/johan-herman-coolhaas


## References

1. [Source](https://oorlogsgravenstichting.nl/personen/28964/johan-herman-coolhaas)
2. [Source](https://www.openarchieven.nl/nha:03B4DE63-C45B-420A-A3D7-47D5FC7B49A9)
3. [1920](https://hdl.handle.net/21.12147/id/7681aa4f-37f4-4a24-b28d-eaf9efff232d)
4. [Source](https://www.genealogieonline.nl/genealogie-richard-remme/I560755.php)
5. [1920](https://n2t.net/ark:/33862/collect/523667)