Need help with these baby names?! ?

Cadence for a girl and Jace for a boy sound great and unique. Also, you should consider Joslyn (it's my older sister's name)! And I don't know about middle names, but I've found that, usually, it sounds good if you have a first name that ends with a consonant sound together with a middle name that ends with an "a" sound (for girls, at least), and vice/versa. Hope this helps! =)