I like [name_u]Arlo[/name_u] [name_u]Wilder[/name_u] the best. It has a good flow and I like both names. I’ll suggest [name_u]Arlo[/name_u] [name_u]Montgomery[/name_u]
For me I love [name_u]Arlo[/name_u] [name_m]Cassian[/name_m]! Not a big fan of [name_u]Wilder[/name_u] but I can see how it goes with it! I also love the suggestion of [name_u]Arlo[/name_u] [name_m]Rafferty[/name_m]!
[name_u]Arlo[/name_u] [name_u]Wilder[/name_u] is my favorite from your list.
[name_u]Arlo[/name_u] [name_m]Judah[/name_m] sounds pretty villainous to me!
Without an idea of how these would flow w/ your LN, i’d also toss in for your consideration:
[name_u]Arlo[/name_u] [name_u]Montgomery[/name_u] (suggested by @fearlessfirefly )
[name_u]Arlo[/name_u] [name_m]Felix[/name_m] (suggested by @TDFM)
[name_u]Arlo[/name_u] [name_m]Bowen[/name_m]
[name_u]Arlo[/name_u] [name_m]Bodi[/name_m]
[name_u]Arlo[/name_u] [name_m]Wesley[/name_m]
[name_u]Arlo[/name_u] [name_m]Wayne[/name_m]
[name_u]Arlo[/name_u] [name_m]Weston[/name_m]
[name_u]Arlo[/name_u] [name_m]Wells[/name_m]
Arlo Winston
[name_u]Arlo[/name_u] [name_u]Ray[/name_u]
I think a MN starting with a W sounds best linguistically, given the terminal O of [name_u]Arlo[/name_u].