Names to go with...

In my story a young woman is pregnant with her third child, unsure if the baby is boy or girl yet. I want to find names for the third child as well as a fourth she will have in the future. I would like them to be unique but not crazy. Last name Grayson or Ryerson.

Mother: Arizona nn Zoey
- had her first son at 17
- had her second son at 20
- almost 23 when story starts

First son: Beckett
- almost 6 when story starts

Second son: August “Auggie”
- almost 3 when story starts

Third child: ?
- born sometime after story starts
- not sure if I want a boy or girl

Fourth child: ?
- born at least eighteen months after third child
- not sure if I want a boy or girl

If I could come up with a fifth name also I’d like go with five kids, possibly twins for third or fourth pregnancy.

I like the name Jacobi nn Jack for a boy, was going to use it for third child, but can’t decide.

I really do appreciate any and all help.