Italian diminutive of Antonio, from the Roman clan name Antonius, of uncertain Etruscan origin.
Antonino is the Italianate and Sicilian diminutive of Antonio, which itself derives from the ancient Roman family name Antonius — a gens of enormous historical importance. The ultimate etymology of Antonius is uncertain: a Greek derivation from *anthos* (flower) has been proposed, though most scholars consider it pre-Latin and possibly Etruscan in origin. What is certain is that the name entered Western consciousness through Mark Antony (Marcus Antonius), the Roman general and triumvir whose alliance and love affair with Cleopatra VII became one of antiquity's great tragic narratives, immortalized by Plutarch and later by Shakespeare.
Antonino as a distinct form flourished especially in southern Italy and Sicily, where the cult of Saint Antonino of Florence (1389–1459) — a Dominican archbishop known for his pastoral care of the poor — gave the diminutive its own devotional standing. The name became deeply embedded in Sicilian naming culture, often passed down across generations as both a first name and an honorific middle name. S.
Supreme Court Justice Antonin Scalia — whose name traveled from Sicilian roots to American legal history in a single generation. In contemporary use, Antonino retains a warmly regional Italian character, evoking sun-bleached piazzas and family Sunday tables, and has begun to attract interest outside Italy as parents seek names with classical gravitas softened by an affectionate ending.