I like it. It's very pretty and Shakespearean, but it's also got a friendly feel, although maybe that's the
Anne association - I'm a fan too (and from the books I'd say your family are very lucky, PEI sounds like a beautiful place to live!)
The sibset looks nice to me, and I like the repeating 'c's too now you've pointed them out. Nice to see a little
Malcolm, it's a great name.
I'd go with
Cordelia Anne, but I think
Maureen and
Iris work well with it too.