gentleman
From LSJ
κατὰ τὸν δεύτερον, φασί, πλοῦν τὰ ἐλάχιστα ληπτέον τῶν κακῶν → we must as second best, as people say, take the least of the evils
English > Greek (Woodhouse)
substantive
Use Ar. and P. καλός κἀγαθός, Ar. καλός τε κἀγαθός.
well-born: use adj. P. and V. γενναῖος, εὐγενής (Plato and Thuc.), Ar. and V. ἐσθλός.
your master's a gentleman: Ar. γεννάδας ἀνήρ, ὁ δεσπότης σου (Ranae 738).