I like
Blythe. I don't know if I'd ever use it, but I feel like it's one of those names that kind of takes you aback for a moment- you don't expect it. I don't think it's dated because it's never been popular.
Blythe and
Matilda work fine as siblings, though I find
Matilda a lot heavier than
Blythe.
Clover is cool in a GP way. I think it would take guts to use it as a first name.