Where does “Wagnerianism” come from?

Wagnerianism (English) comes from English Wagnerian, from English Wagner, from English -ite, from French -ité, from Latin -īta, from Ancient Greek -ίτης, from Ancient Greek πολῑ́της, from Ancient Greek -της — Creates verbal adjectives from verb stems.

Ancestry of “Wagnerianism”, step by step

Wagnerianism traces back through two separate lines of ancestry.

via English Wagnerian

StepLanguageWordMeaning
1EnglishWagnerianOf, or characteristic of Richard Wagner, or his...
2EnglishWagner
3English-iteUsed to form nouns denoting followers or...
4French-itéAlternative form of -té, giving a quality or...
5Latin-īta
6Ancient Greek-ίτηςSuffix forming a masculine noun: one connected...
7Ancient Greekπολῑ́τηςcitizen
8Ancient Greek-τηςForms nouns representing a state of being; Added...
9Proto-Hellenic-tāts
10Proto-Indo-European-teh₂tsUsed to form nouns representing state of being
11Proto-Indo-European-teh₂Used to form nouns representing state of being
12Proto-Indo-European-tósCreates verbal adjectives from verb stems

via English ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Proto-Indo-European -tós