Theo's little brother is called..

[whatshlsnameagain]

Finn (Finley)
Elijah (Eli)
Louis
Rowan
Caleb
Liam

Or something else entirely?

Ralph 😁

From your list, Fin.

Other ideas
Theo and Johnny
Theo and Jack
Theo and Barnaby
Theo and Jake
Theo and Arthur
Theo and Lucas
Theo and Will
Theo and Kit
Theo and Bertie

Theo and Finn

Or

Theo and Douglas
Theo and Aubrey

Theo and Jasper

Josh(ua)

Rowan or Finn!

Oscar

Caleb. Love the name. Have done for years since I discovered kings of Leon

Seb (Sebastian)

Louis

Milo
Luca

Interesting. My eldest ( now 18) has 2 brothers ...and neither of their names are mentioned as sibling choices 😊

...my eldest, who is a Theo....is what that should say. (We NEED an edit button!!).

From your list - Finley or Louis.

Off-list - the first name I thought of was Edward. Theo and Teddy sound adorable!

Also:

Max
Lucas
Oscar

Louis goes well

Will or William?

Toby

Louis

Teddy and Theo