Where does “Pow Grek” come from?

Pow Grek (Cornish) comes from Cornish Grek, from Latin Graecus, from Ancient Greek Γραικός, from Ancient Greek γραῖα, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

Ancestry of “Pow Grek”, step by step

Pow Grek traces back through two separate lines of ancestry.

via Cornish Grek

Step	Language	Word	Meaning
1	Cornish	Grek	Greek person
2	Latin	Graecus	Greek, Grecian, of or pertaining to the Greek...
3	Ancient Greek	Γραικός	Greek; a Graecian, a member of an ancient...
4	Ancient Greek	γραῖα	Graea, Boeotia; Greece
5	Proto-Indo-European	ǵerh₂-	to grow old, to mature

via Cornish pow

Step	Language	Word	Meaning
1	Cornish	pow	country, land; province, region

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