I like it a lot. And most of the
Felicity people I've known have gone quite comfortably by the full form, though I do know one Lissy.
There were sisters who both worked as radio producers, I think, lots of years ago who were named
Felicitas (not
Felicity) and
Dolores. Made me wonder what the parents were playing at. It seems to have a 1930s vibe, so perhaps
Felicity and
Margaret?