MUQAUQIS مقوقس.
The Roman Viceroy of Egypt; al-Muqauqis being his official title.
Muhammad, in the year A.H. 7 (A.D. 628), sent an embassy to this official, inviting hint to Islam The Governor received the embassy kindly, and sent the following reply, “I am aware’ that prophet is yet to arise; but I am of opinion he will appear in Syria. Thy messenger hath been received with honour. I send for thine acceptance two female slaves, who are much admired by the Copts, and also a present of raiment, and a mule for thee to ride on.”
Mary, the fairest of the Coptic damsels, Muhammad kept for himself, and gave the other to Hassan the poet. [MUHAMMAD, MARY THE COPT.]

Based on Hughes, Dictionary of Islam