I really like Sasha Helene. I might get flamed for this, but if you really, really want to use a Finland reference instead of her name then I'd just use Finland. A place name rings a little better than a half word or a male name (Finn), especially with Sasha as pp pointed out.
There are also a lot of variations of Helene and Eleanor.
Helene: Elena, Helena, Elin, Helen, Ellen
Eleanor: Eleanora, Lenore, Nell, Nellie, Elle, Nonie, Nora(h), Noreen, Ellen.