Eutyches

Eutyches (Greek: Εὐτυχής; c. 380–c. 456) was a presbyter and archimandrite at Constantinople. He first came to notice in 431 at the First Council of Ephesus, for his vehement opposition to the teachings of Nestorius; his condemnation of Nestorianism as heresy precipitated his being denounced as a heretic himself.