Where does “Dreyfusist” come from?

Dreyfusist (English) comes from French Dreyfus, from German Dreifuß, from German fuß, from Middle High German vuoȥ, from Old High German fuoȥ, from Proto-West Germanic fōt, from Proto-Germanic fōts, from Proto-Indo-European pṓds — to walk, to step; to stumble, to fall.

Ancestry of “Dreyfusist”, step by step

Dreyfusist traces back through two separate lines of ancestry.

via French Dreyfus

StepLanguageWordMeaning
1FrenchDreyfus
2GermanDreifußtripod
3Germanfußfoot
4Middle High Germanvuoȥa foot
5Old High Germanfuoȥfoot
6Proto-West Germanicfōtfoot
7Proto-Germanicfōtsfoot
8Proto-Indo-Europeanpṓdsfoot
9Proto-Indo-Europeanpódsfoot
10Proto-Indo-Europeanped-to walk, to step; to stumble, to fall

via English ist

StepLanguageWordMeaning
1EnglishistA practitioner or supporter of an ism
2English-istAdded to words to form nouns denoting
3Old French-iste
4Latin-ista-ist; one who practises or believes
5Ancient Greek-ιστήςAlternative form of -τής; -ist
6Ancient Greek-τήςAppended to verbs to form agent nouns
7Proto-Hellenic-tās
Every word from Proto-Indo-European ped-Every word from Proto-Indo-European pódsEvery word from Proto-Indo-European pṓds
Dreyfusist — Etymology, Origin & Word History | Etymology Explorer