"Calatinus", also found as "Caiatinus", the surname of Aulus Atilius Calatinus, a hero of the First Punic War, probably refers either to the town of Cales in Campania, or to the neighboring town of Caia. One of the Atilii Reguli had previously obtained the surname "Calenus", in consequence of a battle fought at Cales in 335 BC. Likewise, "Nomentanus", the name of one of the Atilii during the late Republic, is clearly derived from the Nomentum, an ancient city of Latium, although his particular connection with that town is unknown.