Evelyn Helene Rose is gorgeous, I love it!
I like
Isolde. I say iz-OHL-dee, but I don't know if that's correct. Since it can be hard for people to know how to pronounce it, that's something to consider when choosing a name.
Isolde Bethany Anne is lovely, but not as nice as
Evelyn Helene Rose - I think
Bethany isn't quite right. Other suggestions (not all ending in an -ee sound) are:
Isolde Melody AnneIsolde Willow AnneIsolde Calliope AnneIsolde Rosalie AnneIsolde Julie Anne - or
Julianne?
Isolde Katherine AnneIsolde Marjorie Anne