regemmelech

from Easton's 1897 Bible Dictionary
Regem-melech
friend of the king, one of the two messengers sent by the exiled
Jews to Jerusalem in the time of Darius (Zech. 7:2) to make
inquiries at the temple.
    
from Hitchcock's Bible Names Dictionary (late 1800's)
Regemmelech, he that stones the king; purple of the king
    

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