Shall we do Emilia from your list instead of Eloisa?
I like Lea for Leonora, though I tend to say Leo instead, just because Im more used to the Portuguese Leonor, where the O sound is really prominent.
Theodore and Maximilian work great for twin boys. I like Henry by itself but for me it's got a very classic British feel whereas the others are much more multi-cultural European. Felix, Sebastian, and maybe Damian and Gideon seem to fit a little better with the other names. Thoughts? And we can always axe one of the boys, three instead of four.