# Otakar Čížek
**Wikidata**: [Q74427745](https://www.wikidata.org/wiki/Q74427745)  
**Source**: https://4ort.xyz/entity/otakar-ek


## References

1. Czech National Authority Database
2. [Source](https://aleph.nkp.cz/F/?func=find-c&local_base=aut&ccl_term=ica=xx0062194&CON_LNG=ENG)
3. [Collection of Registry Books at Prague City Archives](https://katalog.ahmp.cz/pragapublica/permalink?xid=0d952ab44c5f497983eb060d1e635c74&scan=133#scan133)