Regem-melech
(friend of the king). The names of Sherezer and Regem-melech occur in an obscure passage of Zechariah. Zec 7:2 They were sent on behalf of some of the captivity to make inquiries at the temple concerning fasting (B.C. 617.)
Bibliography Information Smith, William, Dr "Definition for 'Regem-melech' Smiths Bible Dictionary". bible-history.com - Smiths; 1901.