Where does “Crispus” come from?

Crispus is an English proper name derived from Latin Crispus, meaning curly-haired.

Ancestry of “Crispus”, step by step

Step	Language	Word	Meaning
1	Latin	Crispus	curly; hair
2	Proto-Indo-European	(s)ḱer-	dung, manure, filth; manure, dung, filth