# Siemowit III, Duke of Masovia

> Polish nobleman

**Wikidata**: [Q2132097](https://www.wikidata.org/wiki/Q2132097)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Siemowit_III,_Duke_of_Masovia)  
**Source**: https://4ort.xyz/entity/siemowit-iii-duke-of-masovia


## References

1. Source
2. Freebase Data Dumps. 2013
3. Sejm-Wielki.pl