Rhiannon - one of my favorites! I love how it looks and it has a beautiful meaning. Anwen - Meh. I’m neutral on it, but Annie would be a nice nickname. Eirwen - “Air-wen”? Kinda unattractive, but not horrible. Ceinwen - “Kien-wen”? “Sien-wen”? “Seen-wen”? I dunno.