E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Slang for king, governor, master; méquard, a commander; méquer, to command. All these are derived from the fourbesque word maggio, which signifies God, king, pope, doctor, seigneur, and so on, being the Latin major. (There are the Hebrew words melech and melchi also.)