[name_m]Luigi[/name_m] [name_m]Isaac[/name_m] for a boy? Does it go together? Surname is Italian & starts with the letter I?
I would like [name_m]Isaac[/name_m] [name_m]Luigi[/name_m] better, but is Italian a language spoken in the family and [name_m]Isaac[/name_m] would be hard to pronounce? [name_u]Or[/name_u] is it an honor name best kept in the middle spot?
As an American, I think of [name_m]Luigi[/name_m] as basically the [name_m]Mario[/name_m] Bros. character, and so it gives me a vibe of being an over-the-top charicature of “an Italian guy”. But if it’s a much-loved name in your family or just a name you love in general, you should certainly go for it. Having an Italian last name makes it much more authentic and understandable that you would use it, versus having the last name O’Malley or something. 
[name_m]Luigi[/name_m] [name_m]Isaac[/name_m] works!! They flow well