[name_u]Love[/name_u] [name_m]Atticus[/name_m], [name_m]Aurelius[/name_m], [name_m]Augustus[/name_m]! [name_m]Alpheus[/name_m], [name_m]Septimus[/name_m], [name_m]Silvius[/name_m], and [name_m]Serenus[/name_m] sound cool too! I love the associations with [name_m]Sirius[/name_m] (dog star aka the brightest star, and harry potter) but I just think of Why so Sirius???
I like the suggestions of [name_m]Orpheus[/name_m], [name_m]Octavius[/name_m], Olympius, [name_m]Kaius[/name_m], and [name_m]Artemus[/name_m].
I would add [name_u]Cyprus[/name_u], [name_m]Acacius[/name_m], [name_m]Dionysus[/name_m], [name_m]Azarius[/name_m], Mobius, [name_m]Scorpius[/name_m], Saturninus, [name_m]Gaius[/name_m], [name_m]Marius[/name_m], Servilius, Rodolphus, [name_m]Quirinus[/name_m], [name_m]Perseus[/name_m], [name_m]Maximus[/name_m], Leonius, [name_m]Lazarus[/name_m], [name_m]Ignatius[/name_m], [name_m]Flavius[/name_m], Gessius, Lucceius, [name_m]Festus[/name_m], Albinus, Florus, Eurus, Domitius, [name_m]Zephyrus[/name_m], Favonius, and Cyprianus as well. GP Nautilus, Frostius, [name_m]Aridius[/name_m], Sparticus, and Gladiolus.
And these don’t end with -us but I also like [name_u]Polaris[/name_u], [name_m]Ozias[/name_m], [name_m]Osiris[/name_m], [name_m]Leonidas[/name_m], Azymondias, [name_m]Ozymandias[/name_m], [name_m]Adonis[/name_m], and Pythagoras