Antonius a martyr of the 14th century, who, with his brother, abandoned Paganism for Christianity in Lithuania. The grand-duke Olgar made vain efforts to induce the brothers to abjure Christianity, and finally ordered them to be tortured and hung. They are celebrated as martyrs in the Roman Church April 14. — Acta Sanctorum, April 14; Hoefer, Biog. Generale, 2, 823.