Fruzhin

thumb|262px|The Şoimoş castle near modern Lipova, likely the seat of Fruzhin's Hungarian domains thumb|262px|coat of arms on last bulgarian rulers Fruzhin and Konstantin II Asen in Bayerische Staatsbibliothek, München Fruzhin (; also transliterated Fružin or Frujin; died ) was a 15th-century Bulgarian noble who fought actively against the Ottoman conquest of the Second Bulgarian Empire. A son of one of the last Bulgarian tsars, Ivan Shishman of the Tarnovo Tsardom, Fruzhin co-organized the so-called Uprising of Konstantin and Fruzhin along with Constantine II of Vidin, the last medieval Bulgarian monarch. Fruzhin was mainly based in the Kingdom of Hungary, where he was the ruler of Temes County.

==Biography== Neither Fruzhin's birthdate nor his biography prior to the Fall of Tarnovo to the Ottomans in 1393 are known, but from his involvement in the 1404 uprising, the former can be narrowed down to the 1380s, the same decade his parents married, and there is no mention of him having been a bastard. He had a brother, Alexander, who converted to Islam after the Ottoman conquest, adopting the name Iskender and becoming governor of Samsun and then Smyrna, where he died in 1418. As the capital Tarnovo was captured by the Ottomans, Fruzhin fled initially to the domains of his uncle Ivan Sratsimir at Vidin, in the Bulgarian northwest. He settled in Hungary under Sigismund I some time after that. Sigismund accepted Fruzhin to his court and recognized his claim to the Bulgarian throne. He stayed in Hungary as a member of the Order of the Dragon with some other famous noblemen like Stefan Lazarević, Filipo Skolari, Vlad Dracula and Skenderbeg.