I had a cursed thought (Remon and Romus) and had to continue (disregarding the cool, plausible names, like Vergilius and Romulus)
Janus, Janan
Remus, Remon
Virgil, Virgus, Virgan
Roman, Romus
Logan, Logus
Patton, Pattus
Thomas, Thomus, Thomon
Janus’s light side name is Janan