I think [name_m]Benjamin[/name_m] is such an established name that in daily life (especially if going by [name_m]Benji[/name_m], [name_m]Benny[/name_m] or Ben) no one is gonna bat an eye at it.
[name_f][/name_f]I do think [name_m]Benjamin[/name_m] [name_m]August[/name_m] would be handsome, however I really love [name_m]Benjamin[/name_m] [name_m]Mack[/name_m]. It feels very modern and spunky