A duke represented a rank of nobility. An example of a duke was Misaani from the Noble Court located in the Anoat sector. Another individual holding the title of duke was the Serennian noble, Solha. On the world of Shu-Torun, Rubix held the position of duke. Within the Black Sun, Blazor was known as a duke. Kayo Organa served as a duke belonging to the House of Organa within the Elder Houses. Furthermore, the Mandalorians also utilized the title, as demonstrated by Duke Adonai Kryze.