JabbÃÂr Berdi (Turki/Kypchak and Persian: ìèçñ èñïÃÂ; the name is rendered as Yeremferden in some western sources), was Khan of the Golden Horde from 1414 to 1415 and again from 1416 to 1417.
JabbÃÂr Berdi was a son of Tokhtamysh, and a brother of his immediate predecessor Karëm Berdi. They were descendants of Tuqa-Timur, the son of Jochi, the son of Chinggis Khan.
Tokhtamysh's son Karëm Berdi broke with his family's traditional alliance with Grand Prince Vytautas of Lithuania, and assumed a hostile attitude. Vytautas responded by setting up as rival khan Karëm Berdi's brother Kebek, but Kebek's displacement of Karëm Berdi in 1413 would not last. By 1414, Karëm Berdi had killed Kebek and recovered his throne. Undaunted, Vytautas proclaimed another son of Tokhtamysh, JabbÃÂr Berdi, as khan and sent him against Karëm Berdi. JabbÃÂr Berdi defeated his brother and took power later in 1414. He naturally favored cooperation with Lithuania, and benefited from its support. Nevertheless, Karëm Berdi was apparently still at large, and JabbÃÂr Berdi had another dangerous enemy in the beglerbeg Edigu, who had already proclaimed his own khan, a Tuqa-Timurid named Chekre. In the confused power struggle, JabbÃÂr Berdi was briefly displaced by Edigu and Chekre in 1415, but succeeded in defeating and killing his rival Chekre in 1416. It was perhaps in the next year, 1417, that JabbÃÂr Berdi also eliminated his own deposed brother, Karëm Berdi. Later the same year, JabbÃÂr Berdi was defeated by Edigu and fled to the Crimea. Edigu declared another Tuqa-Timurid, Darwësh khan, while JabbÃÂr Berdi was killed by his own retinue as he attempted to seek refuge in Lithuania.