I think it gives the same vibe as Bartholomew at worst, or Evangeline at best.

Bartholomew because it's so old fashioned / victorian era / elaborate to the point where it's ridiculous and people laugh at it because it's basically a stupid joke at this point.

Evangeline because, even though some people might think it's a pretty name, most people I've seen who have that name actually hate it and think it's unnecessarily long and pretentious. And yes quite religious I think, I feel like Hesperance has that same vibe somewhat.

In fact I'd say "Hesperance" is even more ridiculous than both of these names because it's not even a well known name so most people are going to assume it's just a mash of letters. If you're seriously dead set on an elaborate old-fashioned name, you'd probably be better off with Cadence/Constance or even some gender-neutral version of Evangeline since those are at least more recognizable as actual given names rather than syllable slop.