I’m torn between [name_m]Callum[/name_m] [name_m]Grant[/name_m] and [name_m]Callum[/name_m] [name_m]Archer[/name_m]. I think I like [name_m]Grant[/name_m] a bit more.
I love [name_m]Callum[/name_m] [name_m]Jack[/name_m] {it sounds fun and charming} and [name_m]Callum[/name_m] [name_m]Archer[/name_m] {it is adventurous, and reminds me of [name_u]Robin[/name_u] Hood}. You can’t go wrong with them : )
[name_m]Callum[/name_m] [name_m]Grant[/name_m] is my favorite. I like the 2-1 flow, and I prefer [name_m]Grant[/name_m] to [name_m]Jack[/name_m] because [name_m]Callum[/name_m] and [name_m]Jack[/name_m] have the same vowel sound.
I’m surprised with myself, but I quite like [name_m]Callum[/name_m] [name_m]Harvey[/name_m]!
The rest of your choices are also quite handsome ([name_m]Callum[/name_m] [name_m]Archer[/name_m] is my second favourite) but I like the quirky, unexpected [name_m]Harvey[/name_m] in the middle spot.