Antonius is a ♂ male name.
Antonius is an ancient Roman family name, which possibly derived from the ancient Greek name Anteon, son of Herkules.
Antonius means “of the Antonius family” in Latin and “of inestimable worth” or “priceless one” (from ancient Greek “anti/ἀντἰ” = against + “ṓnios/ὤνιος” = for sale).