Ducal
Part of speech: adjective
Definition: of or pertaining to a duke, a duchess, or the duchy or dukedom they hold
Noble
Part of speech: noun
Definition: An aristocrat; one of aristocratic bloodA medieval coin of England in the 14th and 15th centuries.
Part of speech: adjective
Definition: Having honorable qualities; having moral eminence and freedom from anything petty, mean or dubious in conduct and character
Example sentence: I'm an optimist in the sense that I believe humans are noble and honorable, and some of them are really smart. I have a very optimistic view of individuals.