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