Likely a modern variant influenced by Vernice or Bernice; the latter comes from Greek for "bringing victory."
Vernisa is likely a modern variant influenced by Vernice or Bernice, with the latter associated with victory in Greek. That gives the name a subtle virtue current, even if the form itself is recent and flexible.
The sound is smooth and polished, which helps it feel pleasant and contemporary. Vernisa has the feel of a name that borrows authority from older forms while softening them into something more modern. It sounds elegant without being formal, and distinctive without being hard to pronounce. The result is a name that feels quietly upbeat and stylish.