Konrad Januszowic
| Konrad Januszowic | |
|---|---|
| Personal details | |
| Born | Possibly 1400 Mazovia, possibly Warsaw, Jagiellonian Dynasty | 
| Died | December 9, 1412-1413 Mazovia | 
Konrad Januszowic (ca. 1400 - 9 December 1412 or 1413), was a Polish prince member of the House of Piast.
He was the youngest son of Duke Janusz I of Warsaw and Danutė of Lithuania, a daughter of Kęstutis.