Boys name to go with...

[accidentalgrownup]

Imogen.

On the list so far:

Sebastian
Nathaniel
Oliver (not so keen on its popularity)

Trying to get a few ideas before DH & I fight it out... Imogen was the ONLY girls name we agreed on!

Imogen and Oliver.

Sebastian and Nathaniel are lovely.

How about
Quentin
Christopher
Magnus

The Imogen I know has a brother called Matthias known as Tias

Isaac
Oscar
Elliot
Elijah

Tristan
Maximilian
Edward
Gabriel
Joseph
Laurence
Nicholas
Thomas

Love Sebastian

Joel
Thomas
Rex

How about Tobias?

Imogen and Louis

Nathaniel is nice.

Harrison?

Nathaniel.

My niece is Imogen & her 2 brothers are Oliver & Reuben.

Nice boys names.

Alternatives:
Rupert
Edward
Daniel
Alexander
Samuel
Tristan

All the names on your list go nicely with Imogen.

Dexter
Harry
Jake
Sebastian

Some great suggestions thank you!