Where does “ⲁⲛⲧⲱⲛⲉ” come from?

ⲁⲛⲧⲱⲛⲉ (Coptic) comes from Latin antonius, from Ancient Greek Ἄντων.

Ancestry of “ⲁⲛⲧⲱⲛⲉ”, step by step

Step	Language	Word	Meaning
1	Latin	antonius	The name of a Roman gens, a "family name"
2	Ancient Greek	Ἄντων	—