I like [name_u]Reid[/name_u] or [name_u]Rhys[/name_u] [name_m]Harrison[/name_m] best from your list. Both short, punchy, current but with history, and have the same tailored appeal as [name_u]Arden[/name_u].
[name_u]Wolf[/name_u] [name_m]Harrison[/name_m] is also very cool if you’re willing to go a bit more out there! It’s got the same nature-meets-surname vibe as [name_u]Arden[/name_u], and is very handsome and memorable.
I prefer [name_u]Reid[/name_u] [name_m]Harrison[/name_m]! You could also do [name_u]Rhys[/name_u] [name_m]Harrison[/name_m]. Both [name_u]Arden[/name_u] and [name_u]Reid[/name_u] have a strong R and D sound so they fit without being too matchy matchy.
I love your whole list! [name_m]Silas[/name_m] could also make a cute sibling to [name_u]Arden[/name_u], meaning “from the forest”. [name_m]Silas[/name_m] [name_u]Wolf[/name_u]?
[name_u]Reid[/name_u] [name_m]Harrison[/name_m] is my favorite on your list. I also love love suggestions for [name_u]Remy[/name_u] & [name_u]Dash[/name_u]
[name_m]Dashiell[/name_m] [name_u]Reid[/name_u] or [name_u]Remy[/name_u] [name_u]Wolf[/name_u] would be super handsome with [name_u]Arden[/name_u]
I think [name_u]Reid[/name_u] [name_m]Harrison[/name_m] or [name_u]Reid[/name_u] [name_m]Wells[/name_m] goes well with [name_u]Arden[/name_u] [name_u]Everly[/name_u]!