I named my twins what I thought were not very popular names... 5 years on they are consistently appearing in the top 100 lists, and you even have one yourself (Beau).
We chose our daughters name because we thought it was nice and simple, and not too popular.. and then found out it was number 10 for girls names' last year
My point being, it doesn't matter really if a name is popular, right? It just means more chances of the child having personalised products
I really like Evie, Emma and Lucy from your list. Maybe head on over to nymblar.com and enter those names and see what it suggests based on that?