What about:

Alfred, Alphonse (nn Alfie)
Benjamin (Benjamin Michael)
Callum
Casper/Caspar/ Gaspar
Caspian
Cesare
Dorian
Everett
Felix
Forrest
Graham/Graeme
Griffin
Holden
Hunter
Ignatius
Jeffrey
Llewellyn
Lucien
Raymond
Rupert
Simon
Sirius
Theodore (Theodorian= Theodore + Dorian)
Willoughby (nn. Will)

What about calling him Andrew Simon Hall? That way his initials will spell Ash and you could call him that seeing as you like the name Asher.