What's the difference between gentleman and gentlemanliness?

Gentleman

Definition:

(n.) A man well born; one of good family; one above the condition of a yeoman.
(n.) One of gentle or refined manners; a well-bred man.
(n.) One who bears arms, but has no title.
(n.) The servant of a man of rank.
(n.) A man, irrespective of condition; -- used esp. in the plural (= citizens; people), in addressing men in popular assemblies, etc.

Example Sentences:

(1) But I say to the honourable gentleman we won’t get Britain building unless we keep our economy going.” Later, Marie called in to radio station LBC radio to say that the new Labour leader needed to “change the way he does things, mix things up each week and really not let the Conservatives know which side it’s coming from – firing on all corners but doing it in a calm and collected way”.
(2) I was told very politely by [Sony Radio Academy awards committee chairman] Tim Blackmore, a true gentleman, I did not resent it at all.
(3) Ladies and Gentleman, thank you for joining us this morning.
(4) "He said it was scarcely suitable for a gentleman let alone ladies."
(5) But the Depp dog furore is a perfect example of the different approach Joyce will take to leading the Nationals – the rural-based minor party in the governing Coalition that has in recent years had a series of gentlemanly leaders who, wherever possible, have settled differences with their Coalition parties quietly, created public fusses only rarely, and international incidents never.
(6) Amelia Gentleman writes on social affairs for the Guardian and was one of the research team on Reading the Riots Prison isn't always a suitable punishment : I met Danielle Corns, a 19-year-old student with no previous convictions, who briefly took two left footed trainers out of a shop, thought better of it, and left them outside the shop.
(7) The local undertakers were pleased to discover the great Henty to be the man they had always imagined - a full-bearded giant, stern and wise, dressed like a warrior hero or - much the same thing - a Victorian gentleman with the whiff of gunpowder and the clash of sabres about him.
(8) But then the gentleman is quite old and has suffered two strokes in the last few years – so the comparatively slow rate at which he was fleeing was probably taken as provocation.
(9) Ideally they should also possess the sort of clipped tones that make vulgarities sound like Virgil and the sort of wardrobe that dresses up deviousness as a gentleman's sport.
(10) The librarian – he was a very tall gentleman with a pretty dark beard – went off and figured it out.
(11) Since 1972 there has been a gentleman's agreement between the ministry and the tobacco branch concerning the size and the content of tobacco advertising.
(12) The council will continue to work with this gentleman and his family to ensure that his needs are appropriately met and that he is supported to lead as independent a life as possible.
(13) is his immediate reply, which of course makes perfect sense, because Reprezent's listeners, keen as they are to hear new music, would no doubt prefer Psy's latest song Gentleman.
(14) If the honourable gentleman wants to finish his question in an orderly way, he can do so."
(15) Wednesday 16th July 2014 Photograph: Mike Bowers The two gentleman pictured above foreshadowed new national security laws that will give Asio more powers to snoop on computers and more powers to coordinate with other agencies during investigations.
(16) It was the story of a Bangladeshi gentleman whose home was washed out 1km to sea that drove me into the charity sector.
(17) The Democratic Unionist assembly member for South Down, Jim Wells, described McGrady as "a true gentleman and a tireless campaigner" for the people of his constituency.
(18) The latest fashion must-have for the classless in Cleveland sports a picture of his face with rape in block capitals underneath, making a nuanced reference to allegations against the prospective first gentleman.
(19) On Sunday, the News of the World became the first British newspaper to use paparazzi pictures of the prince since the former PCC chairman Lord Wakeham negotiated a "gentleman's agreement" that would prevent such photographs until he finished his full-time education.
(20) "The gentleman, opening the circular, hinged portcullis on the front of his helmet, offered his services; and perceiving that her modesty declined what her situation rendered necessary, took her up in his arms without further delay and carried her down the hill."