Where does “-hǣd” come from?

-hǣd (Old English) comes from Proto-Germanic haiduz, from Proto-Indo-European (s)kayt-.

Ancestry of “-hǣd”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	haiduz	manner, way; personality, character; appearance
2	Proto-Indo-European	(s)kayt-	—