Solstice sounds cool as a word, but is too much a word and not namey enough. I don't like Bliss for a name. I do like
Dove and
Meadow, but I wouldn't use them myself in real life.
April is fine, but I have a thing where, while I like some month/season names, I find it weird to be named after a month/season you weren't born in, but incredibly dull and uncreative to be named after the season/month you were born in.