[name_f]Oceane[/name_f] is my favorite out of all your choices. I am not sure how well it goes with [name_m]Tanner[/name_m] and [name_u]August[/name_u], but the name itself is great. I guess the three are “thing” names? Occupation, month of the year and ocean? Could be. I think [name_m]Tanner[/name_m] and [name_u]August[/name_u] are popular currents. I know one [name_m]Tanner[/name_m] and a handful of Augusts. I’ve never met an [name_f]Oceane[/name_f] though. Your girl list is more “out there”.
I would say that [name_u]Oakley[/name_u] is better matched as a sister for [name_m]Tanner[/name_m] and [name_u]August[/name_u]. They have a certain [name_m]Wild[/name_m] [name_u]West[/name_u] look and charm.