Gentleman

GENTLEMAN – a member of the gentry, a descendant from an aristocratic family whose income came from the rental of his land

Merriam-Webster Online Dictionary
gentleman (noun)
1.
a) a man of noble or birth - gentle
b) a man belonging to the landed - gentry
c) (1) a man who combines gentle birth or rank with chivalrous qualities
(2) a man whose conduct conforms to a high standard of propriety or correct behavior
d) (1) a man of independent means who does not engage in any occupation or profession for gain
(2) a man who does not engage in a menial occupation or in manual labor for gain
2.
- valet often used in the phrase gentleman's gentleman
3.
a man of any social class or condition - often used in a courteous reference show this gentleman to a seat or usually in the plural in address ladies and gentlemen