Where does “graig” come from?

graig (Old Irish) comes from Latin gregis, from Latin grex, from Proto-Indo-European ger- — to turn, bend, twist, wind; to tie, bind...

graig (Old Irish): horses

Definitions

Step	Language	Word	Meaning
1	Latin	gregis	genitive singular of grex
2	Latin	grex	a group of smaller animals: a flock of birds, sheep, etc., a pack of dogs, wolves, etc., a swarm of insects, etc
3	Proto-Indo-European	ger-	to turn, bend, twist, wind; to tie, bind...