Cannot agree on a single boys name!

[Boyontheway]

I'm starting to panic slightly as not only do we not have a boys name, our shortlists seem to be poles apart!
I like Celtic names, my current favourites are Lachlan, Cathal, Tiernon, Rhys, Finn, Fionan, Darragh but DH prefers more classical/royal names like William, Charles, Henry etc
Need help finding middle ground please!

Rory or spelling variants?

Andrew or Alexander?

Callum, Caleb, Ross.
I like Rhys, it takes me back to my Welsh primary school.
Elliot

Angus, Cameron, James nn Jamie, Duncan, Patrick, Alistair, Alexander

Cillian
George
Harry
Kieran

Alec
Christopher "Kit"
Douglas
Jack
Lewis
Louis
Owen
Arran
Malcolm
Gregor
Miles
Fraser
Sean
Logan
Thomas
Archie
Dylan
Oscar
Euan
Calvin
Hamish
Evan

Ruaridh/Ruari (pronounced Roo-ri) or Rory.
How about Finlay/Findlay as a more traditional name to fit your DH's tastes but nickname Fin/Finn to fit your's?

Aidan?