Jan I may refer to:
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Jan I the Scholastic
Jan I the Scholastic ( pl, Jan I Scholastyk; 1308/10 – 1372 before 29 September), was a Duke of Oświęcim from 1324 until his death.
He was the eldest child and only son of Duke Władysław of Oświęcim by his wife Euphrosyne, daughter of Duke ...
(1308/10 – by 1372)
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John I, Duke of Opava-Ratibor
John I of Opava-Ratibor ( cz, Jan I. Ratibořský; german: Johann I. von Troppau-Ratibor; – ) was the founder the Opava branch of the Bohemian Přemyslid dynasty, which lasted until 1521. In 1365, he became the sole heir of the Duchy of Racib ...
(c. 1322 – c. 1380 or 1382)
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Jan I van Brederode Jan van Brederode ( Santpoort, 1370/1372 – Azincourt, 25 October 1415) was lord of Brederode and during his life lay brother and soldier.
Life
Jan was the son of Reinoud I van Brederode and Jolanda van Gennep. In 1390 he succeeded his fathe ...
(1370/1372 – 1415)
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Jan I, Duke of Żagań (c. 1385 – 1439)
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Jan I Olbracht (1459–1501), King of Poland
{{hndis, Jan 01