Where does “Emersonism” come from?

Emersonism (English) comes from English Emerson, from English -son, from Middle English -son, from Middle English -es, from Old English -es, from Proto-Germanic -as, from Proto-Indo-European -ēs, from Proto-Indo-European -ess — Creates action nouns or result nouns from verbs;...

Ancestry of “Emersonism”, step by step

Emersonism traces back through two separate lines of ancestry.

via English Emerson

StepLanguageWordMeaning
1EnglishEmersonRalph Waldo Emerson, American writer
2English-sonAdded to a stem to form a patronymic or...
3Middle English-sonson
4Middle English-esAlternative form of -yssh; Alternative form of...
5Old English-espossessive marker, indicating that an object...
6Proto-Germanic-asused in formation of adverbs
7Proto-Indo-European-ēsPrimarily forms adjectival bahuvrīhi compounds
8Proto-Indo-European-ess
9Proto-Indo-European-osCreates action nouns or result nouns from verbs;...

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 -osEvery word from Old English -esEvery word from English -son