Where does “witch-finder” come from?

witch-finder (English) comes from English finder, from German Finder, from German -er, from Old High German -āri, from Proto-West Germanic -ārī, from Proto-Germanic -ārijaz, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ancestry of “witch-finder”, step by step

witch-finder traces back through two separate lines of ancestry.

via English finder

StepLanguageWordMeaning
1EnglishfinderOne who finds or discovers something; An optical...
2GermanFinderfinder
3German-erForms agent nouns etc. from verbs, suffixed to...
4Old High German-āriused to form agent nouns
5Proto-West Germanic-ārī-er
6Proto-Germanic-ārijaz-er
7Latin-āriuser
8Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)

via English Witch

StepLanguageWordMeaning
1EnglishWitchA person (now usually particularly a woman) who uses magical or similar supernatural powers to influence or predict events, particularly one with malicious motives
2Middle Englishwicchewitch, wizard, sorceror; pagan, heretic,...
3Old Englishwiċċe(female) witch
4Proto-Germanicwikkōnąto practice sorcery
5Proto-Indo-Europeanwik-néh₂-
6Proto-Indo-Europeanweyk-to separate, to choose; to contain, to envelop;...
7Proto-Indo-Europeanwey-to wither; fade; to move, go ahead; to be strong;...
Every word from Proto-Italic *-āzios