Gentlemanly vs Gentlemanlike - What's the difference?

As adjectives the difference between gentlemanly and gentlemanlike

is that gentlemanly is of, being, pertaining to, or resembling a gentleman or gentlemen while gentlemanlike is like a gentleman; courteous.

is in the manner or with the behavior of a gentleman; with social grace, politely.

(en adjective)

Of, being, pertaining to, or resembling a gentleman or gentlemen.

* 2010 , Catherine Rampell, “ In Law Schools, Grades Go Up, Just Like That”, in The New York Times , 2010 June 22, page A1:

Some schools bump up everyone’s grades, some just allow for more As and others all but eliminate the once-gentlemanly C.

(en adverb)

In the manner or with the behavior of a gentleman; with social grace, politely.

* 1938 , Charles A. Johnson, A Narrative History of Wise County, Virginia (page 165)

He went gentlemanly dressed in East Virginia style, wore a high-top silk hat, as had lawyer Park, and sported a gold headed walking cane.

* (l)

(en adjective)

Like a gentleman; courteous.