Varnava Nastić was a 20th-century Serbian Orthodox auxiliary bishop who served as the titular Bishop of Hvosno. Born in Gary, Indiana, to immigrant parents, he later moved to Yugoslavia, where he pursued theological studies in Belgrade. He rose through the monastic ranks to become an assistant to the Serbian Patriarch. Known for his opposition to communist ideology, he faced imprisonment and significant hardship before his death in 1964. He is recognized as a confessor of the faith within the Serbian Orthodox tradition.