I have no idea why
Louisa isn't more common. It is a lovely name and truly a classic.
I honestly had no idea that the name wasn't in the top 1000. How is that?!
I like both
Luisa and
Louisa. I would probably have to go with
Louisa though, it looks "rounder" than
Luisa.
Between
Louise and
Louisa, I will always choose
Louisa.
Louise is pretty but it's just not a name I would use.
I pronounce the name loo-EE-sa.
I do not know one. :(