Meaning: Of
Heaven (or, Belonging to
Heaven).
The ancient Romans would have said: Kighly (to rhyme with Highly). In church Latin it'd probably be more like Cheely or Cheeligh.
Are you sure it's used as a name? Seems very odd! Perhaps it's intended as a male version of
Celia, or a thoroughly kre8iv spelling of
Kelly. I'd be interested to know where you foundit.