
1) Ancient Roman title 2) Byzantine court title
Found on
https://www.crosswordclues.com/clue/nobilissimus

Nobilissimus (Latin: `most noble`), in Byzantine Greek nōbelissimos (Greek: νωβελίσσιμος), was one of the highest imperial titles in the late Roman and Byzantine empires. The feminine form of the title was nobilissima. ==History and functions== The term nobilissimus originated as an epithet to the title of Caesar, whose holder was t.....
Found on
http://en.wikipedia.org/wiki/Nobilissimus
No exact match found.