This is an English surname, meaning “battle-brave,” which means he’ll be the one charging into an unsuspecting sibling later on. Don’t say you weren’t warned.
It’s pretty much just limited to Wy.
Famous people named Wyatt:
Actor Wyatt Russell; old west lawman Wyatt Earp; baseball player Wyatt Toregas; comedian Wyatt Cenac.
This is still an overwhelmingly boy name, but its popularity for girls got a bump when Ashton Kutcher and Mila Kunis named their daughter Wyatt.