 Fruzhin was mainly based in the Kingdom of Hungary, where he was the ruler of Temes County.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's 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.