Elinor is great, but I'm not so keen on
Eleanor. The former just sounds so much sleeker and more modern, even though it's got so much history. Unfortunately, I'd never use it- I ABHOR the nickname
Ellie, and it would inevitably be used right away.
Summer Rain/Rose are both pretty, but... they kinda sound like Bath and Body Works lines.
Summer sounds quite fluid and natural with other word names, but I do think it benefits from a first/middle name that's a little more traditional.