Skip to tree
Skip to ranking
Gotha
/
☰
Houses
Ranking
Guides
About
🇬🇧
EN ▾
🇬🇧
English
EN
🇨🇳
中文
ZH
🇮🇳
हिन्दी
HI
🇪🇸
Español
ES
🇸🇦
العربية
AR
🇫🇷
Français
FR
🇧🇩
বাংলা
BN
🇵🇹
Português
PT
🇮🇩
Bahasa Indonesia
ID
🇵🇰
اردو
UR
Houses
Ranking
Guides
About
🇬🇧
EN ▾
🇬🇧
English
EN
🇨🇳
中文
ZH
🇮🇳
हिन्दी
HI
🇪🇸
Español
ES
🇸🇦
العربية
AR
🇫🇷
Français
FR
🇧🇩
বাংলা
BN
🇵🇹
Português
PT
🇮🇩
Bahasa Indonesia
ID
🇵🇰
اردو
UR
Home
/
Piast dynasty
/ Janusz I the Old
Version française
Janusz I the Old
Polish noble
[1]
Born
1347
Died
8 Dec 1429
Nationality
Poland
[1]
Documented descendants
17
Titles & positions
duke
[1]
House
Piast dynasty
[1]
Piasts of Mazovia
[1]
Religion
Catholicism
[1]
Sources
Wikidata Q2975528
(retrieved 1 Nov 2026)
Janusz I the Old (1347–1429), duke | GOTHA Directory