Middle Name Struggle!

Alyxandrea • 1716 32017 ❤️
I don't know if I'm having a boy or girl yet, so I figured out names for both. 
Girl- Natalie
Boy- Jacob 
I'm absolutely set on these names, I adore them. I just can't figure out a middle name. For Natalie, I was thinking Elizabeth, Renee, or Rose. & For Jacob, all I can think of is Jacob Lee. Help?? ): 
Hoping for a girl this time. 💖💖