Emir Ambrus
Emir Ambrus (634-644) also known as Khalid was the Sadducee-Ishmaelite leader of Tachkastan.
Before he came to power, his Sadducee-Ishmaelite predecessor sent him to conquer the Bakr faction of Al-Hira in 633 forcing the Banu Qabisah to serve him as spies.
After he came to power he led Tachkastan against the Patriarchate of Jerusalem. Sophronius surrendered the city to him in 636.
He favoured Monophysites and appointed the Monophysite Armenian Patriarch Abraham I as Patriaarch of Jerusalem in 638.
He considered the Monophysite Coptic Pope Benjamin the holiest man he had ever met.
He invited the Monophysite Syriac Patriarch John of the Sedre to explain the Christian doctrine to him and ordered translations of the New Testament.
Before he died he was known by the name Muhmad (Syriac) or Mahmet (Pahlavi & Armenian).
