I am very surprised that people aren't supporting this. No one knows what Jove means (plus it sounds ridiculous), and Jovia... well, it isn't worse than Selena but it's still a bit hard to parse. Jovian is a common word, fits perfectly as a term meaning 'like Jupiter,' isn't awkward on the tongue at all and is being used to refer to Jupiter-like planets in real life.
@SpaceEngineer, since you want to keep terminology consistent, I will point out that gas giant classes are already completely different from solid classes - the latter are named directly after materials, but the former use proper names as (essentially) metaphors. If you're trying to connect them to Jupiter or Neptune, why balk at using adjectives?