Eliot's and Haydn's brother?

[didntshe]

Any ideas?

Those are mainly boys' names but there are a few girls with the names - so I'd go for a similarly boyish name that is occasionally given to girls.

Finley
Ainsley
Daryl
Morgan
Riley

I think all of these make a brilliant sibset.

Joseph
Jacob
Elijah

Wilkie
Quinn
Drew

Caleb
Carl
Benjamin

Rhys
Mathieu
Daryl

Callum
Shaun
Lewis

Zach
DP said Reuben

Liszt

Franklin

Jack
Jasper