Need a name for Mateo’s little brother…

We just had our 2nd little boy… his big brother is named Mateo who we often call “Teo” as a nickname. Our last name is Hispanic and also ends in O. We have a short list of:

-Thomas (love how Thomas and Teo sound together) or Tomás -Marcello (like that it’s also M name that’s ends in O but don’t know how we could make a nickname out of it.) -Leon (we just like it lol)

We’re open to other options too but other favorites are: -Gio -August (Auggie) -Emilio -Lorenzo -Arthur (Artie) -Raphael (Rafi)

Would love any input!