'''Emir Ambrus''' (634-644) also known as '''Khalid''' (Arabic) or '''Amr''' (Coptic) or '''Amrh''' (Armenian) was the Sadducee-Ishmaelite leader of [[Tachkastan]].
Before he came to power, his Sadducee-Ishmaelite predecessor (Abu Bakr) 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 in 634.