Where does “haigrō” come from?

haigrō (Frankish) comes from Frankish hraigrō, from Proto-Germanic hraigrô, from Proto-Indo-European (s)kreik-.

Ancestry of “haigrō”, step by step

Step	Language	Word	Meaning
1	Frankish	hraigrō	heron
2	Proto-Germanic	hraigrô	heron
3	Proto-Indo-European	(s)kreik-	—

haigrō — Etymology, Origin & Word History | Etymology Explorer