English word brokage comes from English broker

Detailed word origin of brokage

Dictionary entry	Language	Definition
broker	English (eng)	(computing) An agent involved in the exchange of messages or transactions.. A mediator between a buyer and seller.. A mediator in general, one who liaises between two or more parties to attempt to achieve an outcome of some kind.. A stockbroker. To act as a broker; to mediate in a sale or transaction.
brokage	English (eng)	(archaic) The act of a broker; brokerage.