chevaree

The only usage I know of the word chevaree is in the name of Robet Chevaree. The most traditional word used in the sentence you mention, otherwise, is chivalry.  As in "Who said chivalry is dead?"

Unless, of course, you do mean Robet Chevaree, or, I have googled it, and, found a place in England with that name. So, if you are talking about a declined population, or the death of Robet, or, something like that, then, absolutely, you can use the word, as you asked about, except that it should be capitalized.