triumvir

One of three men sharing public administration or civil authority in ancient Rome.

One of three people sharing public administration or civil authority.

One of three men united in office; specifically, in ancient Rome, a member of one of several groups of joint magistrates chosen for various purposes, as for establishing colonies, revising the lists of knights, guarding against fires by night, or to fill various extraordinary commissions on special occasions.

One of tree men united in public office or authority.

One member of a triumvirate

one of a group of three sharing public administration or civil authority especially in ancient Rome