Where does “Hellenismos” come from?

Hellenismos (English) comes from Ancient Greek Ἐλληνισμός — imitation of the Greeks.

Ancestry of “Hellenismos”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Ἐλληνισμός	imitation of the Greeks

Hellenismos — Etymology, Origin & Word History | Etymology Explorer