Answer
The Nestorian Church, named after Nestorius, an influential 5th-century theologian and patriarch of Constantinople, was established following the condemnation of Nestorius' teachings at the Council of Ephesus. Central to Nestorius' theology was the belief that Christ had two distinct natures, divine and human, united in one person. This view, deemed heretical by the ecumenical councils, led to the eventual separation and formation of the Nestorian Church.