O-mar
Illustration of Mar Elias, a bishop of the Church of the East, from the 18th–19th century
East Syriac: Mar or West Syriac: Mor is a title of respect in Syriac, literally meaning ‘my lord’. It is given to all saints and is also used before Christian name of bishops.
https://en.wikipedia.org/wiki/Mar
https://en.wikipedia.org/wiki/East_Syrian_Rite