أنطون (Antun) is also used by Arab Christians living in the Arab world. It appears to be an arabisation of Anton, whilst أنطونيوس (Antuniyus) is the arabised form of the original Roman name, Antonius:https://en.wiktionary.org/wiki/أنطونيوس (in English)Antun is alternatively transcribed as Antoun and even Antoon:https://en.wikipedia.org/wiki/Antoun (in English; also lists 4 bearers of the spelling Antoun)A notable bearer of the name was the Syrian philosopher and human rights activist Antun Maqdisi (1914-2005):https://en.wikipedia.org/wiki/Antun_Maqdisi (in English)
Fra (Friar) Antun is a minor character in Téa Obreht's "The Tiger's Wife," which takes place in unnamed Balkan countries (as determined by geographic locations mentioned within the story, most likely Serbia and Croatia).