[name_m]Alexander[/name_m] [name_m]Magnus[/name_m] does sound very regal, however, the softer, more casual [name_u]Sasha[/name_u] as nickname really lightens things up so it doesn’t feel pompous or anything like that. I like it a lot.
I like it. Both names are names of characters from Mortal Instruments, but since [name_m]Alexander[/name_m] is quite a common name, the connection isn’t too strong
I love [name_m]Alexander[/name_m]! It sounds great with [name_m]Magnus[/name_m], too. I don’t think it sounds snobby at all - especially not with nn [name_u]Sasha[/name_u].