Where does “Antonache” come from?

Antonache (Romanian) comes from Greek Αντωνάκης, from Greek Άκης, from Greek -άκης, from Byzantine Greek -άκης.

Ancestry of “Antonache”, step by step

Step	Language	Word	Meaning
1	Greek	Αντωνάκης	Tony
2	Greek	Άκης	—
3	Greek	-άκης	Gives a diminutive form of a masculine first...
4	Byzantine Greek	-άκης	—