I really like [name_m]Oslo[/name_m]. I have asked about it before on the forum and it received lukewarm feedback, but I still love it.
As for your middle names, I am personally not a fan of [name_m]Ferdinand[/name_m] or [name_m]Royce[/name_m] by themselves, but would lean toward [name_m]Royce[/name_m] here. Options I like more:
[name_m]Oslo[/name_m] [name_m]Everett[/name_m]
[name_m]Oslo[/name_m] [name_m]Jefferson[/name_m]
[name_m]Oslo[/name_m] [name_m]Nicholas[/name_m]
[name_m]Oslo[/name_m] [name_m]James[/name_m]