I love
Blythe. I knew a girl named
Blythe in high school, and I really thought it was swell.
It's different, spunky, and totally usable. I also think
Blythe works with
Matilda.
I would only use
Clover as a middle name. There's something quaint about it, but that could be because I associate it with...animals, or a farm, or something.