# Janusz III of Masovia

> Polish duke

**Wikidata**: [Q1378676](https://www.wikidata.org/wiki/Q1378676)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Janusz_III_of_Masovia)  
**Source**: https://4ort.xyz/entity/janusz-iii-of-masovia


## References

1. Q137210372
2. [Source](http://mak.bn.org.pl/cgi-bin/KHW/makwww.exe?BM=1&NU=1&IM=4&WI=9810620754205606)
3. MAK
4. Freebase Data Dumps. 2013
5. Sejm-Wielki.pl