You searched for: “archdukes
archduke (s) (noun), archdukes (pl)
1. The chief duke: An archduke was formerly the title of the rulers of Austrasia, Lorraine, Brabant, and Austria, being assumed by those of Austria in 1359. Now an archduke is the titular dignity of sons of the Emperor of Austria.
2. Etymology: from Latin arch-, "chief" or "highest ranking" + dux, genitive of ducis, "leader, commander"; from ducere, "to lead".