Where does “Indo-Greek” come from?

Indo-Greek (English) comes from English greek, from Old English Grēcas, from Esperanto kreko, from Latin Graecus, from Ancient Greek Γραικός, from Ancient Greek γραῖα, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

Indo-Greek (English): a proposed branch within the Indo-European...

Definitions

a proposed branch within the Indo-European...

Ancestry of “Indo-Greek”, step by step

Step	Language	Word	Meaning
1	English	greek	Alternative letter-case form of Greek; To display...
2	Old English	Grēcas	the Greeks; Greeks
3	Esperanto	kreko	teal
4	Latin	Graecus	Greek, Grecian, of or pertaining to the Greek...
5	Ancient Greek	Γραικός	Greek; a Graecian, a member of an ancient...
6	Ancient Greek	γραῖα	Graea, Boeotia; Greece
7	Proto-Indo-European	ǵerh₂-	to grow old, to mature

Every word from Proto-Indo-European ǵerh₂- →Every word from Ancient Greek γραῖα →Every word from Ancient Greek Γραικός →