Antonius \a-nto-nius, an-tonius\ as a boy's name is a variant of Anthony (Latin) and Antonio (Spanish, Italian). See for meaning of Antonius.

The baby name Antonius sounds like Antons, Antonino, Antonin, Antonije, Antoni and Antonito. Other similar baby names are Adonias, Adonis, Andrius, Andonia, Antaeus, Anteus, Antaios, Antony, Antoine, Antoney, Antone and Anton.