Congrats on baby 3!
Jace and
Jonas are too similar-sounding for siblings, imo.
Jonah would be better.
Jonas James also has a lot of repeating sounds.
I'd pick
Jett Thomas out of your options.
Other ideas (most of these can be mixed and matched):
Jonah ThomasFinn OscarKai EverettMiles BenjaminJude WilliamAtlas MichaelOrion JamesGrey Joseph
Calla Jane is a beautiful name, btw.
LISTEN TO THE MUSTN'TS
-
Shel Silverstein
Listen to the MUSTN'TS, child,
Listen to the DON'TS
Listen to the SHOULDN'TS
The IMPOSSIBLES, the WON'TS
Listen to the NEVER HAVES
Then listen close to me—
Anything can happen, child,
ANYTHING can be.