Wiktionary
nobilissimus
n. A senior title of nobility conferred to members of the Roman and Byzantine imperial families.
Wikipedia
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.
Usage examples of "nobilissimus".
I be nobilissimus, for I mean to leave Frank seventy pounds a year, and I desire you to tell him so.