Where does “cresteth” come from?

cresteth (English) comes from English crest, from Middle English creste, from Old French creste, from Vulgar Latin *cresta, from Latin crista, from Proto-Indo-European (s)ḱer- — dung, manure, filth; manure, dung, filth.

Ancestry of “cresteth”, step by step

cresteth traces back through two separate lines of ancestry.

via English crest

StepLanguageWordMeaning
1EnglishcrestThe summit of a hill or mountain ridge; A tuft,...
2Middle Englishcreste
3Old Frenchcreste
4Vulgar Latin*cresta
5Latincristathe crest, the plume; the comb or tuft on the...
6Proto-Indo-European(s)ḱer-dung, manure, filth; manure, dung, filth

via English eth

StepLanguageWordMeaning
1EnglishethA letter introduced into Old English to...
Every word from Proto-Indo-European (s)ḱer-