Antonius is a Danish, Dutch, Finnish, Latin, Norwegian, and Swedish name used in Greenland, Denmark, Norway, Sweden, Finland, part of the Republic of Karelia, Estonia, Belgium, Netherlands, Suriname, South Africa, Namibia, and Indonesia, while Antoníus is an Icelandic name used in Iceland.
Antonius is the nomen of the gens Antonia, an important plebeian family of ancient Rome.
Marcus Antonius claimed that the gens was descended from Anton, a son of Hercules.
The Antonii produced a number of important generals and politicians, some of whom are listed below.
Antonius or Anthonius is a common given name in the Netherlands; in daily life, most people with this name use short forms like Antoine, Anton, Antoni(e), Antoon, Teun, Teunis, Theunis, Theuns, Toine, Ton, Tony, Toon and Twan.