[name_m]Milo[/name_m] strikes me as either forever “little boy” energy or a pet, dog, cat, hamster etc.
[name_f][/name_f][name_m]Nicholas[/name_m] is sophisticated, timeless, works well with [name_m]Henry[/name_m]. [name_m]Nico[/name_m] is an adorable nickname and gives better vibes than “Nicky”, if he were to have a middle name beginning with J his nickname could be “NJ” for example. I wouldn’t fully rule out a name for a lack of nickname options. [name_m]Or[/name_m] she herself could nickname him [name_m]Nico[/name_m] and her husband nickname him [name_m]Nicky[/name_m]. It won’t matter once he’s earthside, they’ll be besotted with him.
[name_f][/name_f]Colin/Collin is a cute option, [name_m]Henry[/name_m] and [name_m]Colin[/name_m] sound like two little old men, it’s adorable. I would say don’t stress about spelling. At some point in your life you have to correct at least someone, it’s no big deal. If she’s that concerned, she should name him [name_m]Jack[/name_m]. You can’t misspell that name.
[name_f][/name_f][name_m]Gabriel[/name_m] is one of the names I’ve always just really not connected with. It screams gospel and religious to me, as well as the nickname [name_m]Gabe[/name_m] which just is not my thing.
[name_f][/name_f][name_m]William[/name_m] is a classic, timeless gorgeous name. [name_m]Henry[/name_m] and [name_m]William[/name_m] are adorable together, but as I’m sure people will point out, it’s like the [name_f]British[/name_f] Prince’s. (Harry’s real name is Henry) This wouldn’t sour the names together for me at all. Not many people would make the correlation because most know [name_m]Harry[/name_m] as [name_m]Harry[/name_m]. Also the nickname [name_m]Will[/name_m] is like [name_m]Jack[/name_m] for me, effortlessly chill.
[name_f][/name_f]I would choose [name_m]Nicholas[/name_m] “Nico, [name_m]Cole[/name_m], Ollie”, [name_m]Colin[/name_m] (with one l because two L’s gives me last name vibes) or [name_m]William[/name_m] “Will, [name_m]Liam[/name_m], Billie”.