| Jan Seyum | |
|---|---|
| Reign | 11th century |
| Predecessor | Tatadim |
| Successor | Germa Seyum |
| Dynasty | Zagwe dynasty |
| Father | Mara Takla Haymanot |
Jan Seyum was a King (negus) of Ethiopia, and a member of the Zagwe dynasty. Taddesse Tamrat states that he was a son of Mara Takla Haymanot, a younger brother of King Tatadim, and the father of Yemrehana Krestos. His name does not appear in the longer king lists.