Noun
The state of being gentlemanly; gentlemanly conduct or manners.
Source: Webster's dictionaryMen have got more of a discerning eye. They appreciate cut and details, things that aren't so obvious. They like things that have cachet and gentlemanliness. John Galliano
The great actors, like Cary Grant, and the gentlemanliness that they portray in the movies is something that I try to keep in mind. Michiel Huisman