единоверческий(adjective of единоверец; Edinoverie is an arrangement between certain Russian Old Believer communities and the official Russian Orthodox Church, whereby the communities are treated as a part of the normative Orthodox Church system, while maintaining their own traditional rites)
екзарх(= экзарх; 1 (in the Orthodox Church) a bishop lower in rank than a patriarch and having jurisdiction wider than the metropolitan of a diocese; 2 (historically) a governor of a distant province under the Byzantine emperors)