What is Imogen's brother called?

[IBelieveInPink]

Due in a couple months. Been through a lot of names but feel like we haven't found 'the one'.
DH likes American names
I like English/Scottish names, and prefer those that are slightly less common but not too 'out there'
We don't agree on much.

Thank you!

I've got an Imogen and an Adam..

Luke
Ethan
Owen
Lewis
Aaron

Barnaby

Arthur

Eli
Noah
Thomas
Oliver
Benjamin
Samuel

Imogen and Max

Imogen and Josh

Imogen and Theo

Imogen and Rufus

Imogen was my first choice for a girl, but we had a boy. We called him Zachary!

Joshua
Alexander
Ben
Jacob

Edward
George
Rory
Jonathan
Rufus
Ralph

Angus
Sebastian

Imogen I know has 2 brothers, Sebastian and Grayson.

Gabe.

Rory

What about Fraser? Scottish but also quite American?

Or Harrison, Robert, Jasper, Jonathan/ Jonty?

I know an Imogen who's brothers are Thomas and Nathaniel. With potential nn options, Tom, Tommy, Nath, Nate.

Angus, Hector, Hamish, Brodie, Cameron, Corey, Douglas, Donald, Euan, Evan, Finlay.

I love Nathanial. I also think William sounds nice alongside Imogen.

Imogen and Theodore (Theo)

My daughter has a friend named Imogen, her brothers are Henry and George.