1. Technically it could, but it’s probably more used as a nickname.
2. Yes.
3. It’s interesting and kind of pretty. It reminds me of
Kirrily.
4. Never been a fan of
Holly, so I would go with Merrily, and probably use
Merry as a nickname occasionally.
5. No idea really, but a guess would be that it’s part of a greeting, like
Merry Christmas etc.
**I love God far too much to be religious -
Jean Claude Koven**