Jan | |
|---|---|
| Reverend of twenty Wrocław dioceses | |
 Coat-of-arms of Upper Silesia (Cieszyn, etc) | |
| Born | 1339/40 |
| Died | after 18 May 1359 |
| Noble family | Silesian Piasts |
| Father | Casimir I, Duke of Cieszyn |
| Mother | Euphemia of Warsaw |
Jan of Cieszyn (Polish: Jan cieszyński; 1339/40 – after 18 May 1359), was a Polish prince, member of the Piast dynasty in the Cieszyn branch.
He was the fourth son of Casimir I, Duke of Cieszyn, by his wife Euphemia, daughter of Duke Trojden I of Czersk-Warsaw.