Where does “грькъ” come from?

грькъ (Old East Slavic) comes from Vulgar Latin graecus, from Ancient Greek Γραικός, from Ancient Greek γραῖα, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

Ancestry of “грькъ”, step by step

Step	Language	Word	Meaning
1	Vulgar Latin	graecus	Greek
2	Ancient Greek	Γραικός	Greek; a Graecian, a member of an ancient...
3	Ancient Greek	γραῖα	Graea, Boeotia; Greece
4	Proto-Indo-European	ǵerh₂-	to grow old, to mature

Words derived from “грькъ”

грек
grikkr
grikki
grekar
грек
грек
грек
Grikkaland

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