BT Tan 21a(21) :עד דאתא אילפא מלך ר׳ יוחנן‏ : before PN1 came back PN2 had become headman
See the entire entry for mlk vb. to rule; to advise; to promise

BT Tan 21a(21) :עד דאתא אילפא מלך ר׳ יוחנן‏ : before the boat arrived, PN had become in charge
See the entire entry for ˁaḏ conj. until