I really like
Eleri! It has been on my list for a couple of years. On first glance it looks like it would be pronounced the same as
Ellery, but I found out it is pronounced e-LEH-ree, which I think is more feminine and pretty!
Eleri Katharine is a lovely combo.
Miriam is about due for a comeback imo. I don't find it too serious at all! I love the nicknames Miri and
Mira.