From your list I like the names Freya and Estella best for a girl, especially with your daughters names. I prefer Olympia Wallis to Olympia Georgiana. What about Ollie as a nn? I love the name Alfred! I know an 8 year old Alfred and he's only ever called Alfred, though I do think Freddie is a cute nn.
Oh, I like Olympia Wallis. A lot. If you love Alfred, then you should keep it!
Ok, we are going with Olympia Wallis or Hugh Frederick. Ollie is an adorable nick-name.
Thanks so much to everyone that helped! I know Freya was the popular choice, but I've been meeting a lot of Freyas lately.