I like
Ione, there's a memorial bench near to where I live for an
Ione and I always sit on it when I walk my dog. I knew the woman as well before she died (she was 90 about 7 years ago) and she was a really lovely lady so its a nice asociation for me.
Ione is a great name but I also like
Iona.
Iolanthe makes me think of a landfill site for some reason and its a bit much spelling wise. don't like it.