Original: Members of the church were once known as Melkites, because they remained in communion with the Ecumenical Patriarchate of Constantinople after the schism that followed the Council of Chalcedon in 451.
Simplified: In Egypt, members of the Greek Orthodox Patriarchate were also known as Melkite, because they remained in communion with the Ecumenical Patriarch of Constantinople after the schism that followed the Council of Chalcedon in 451.