Where does “pseudoleprechaunism” come from?

pseudoleprechaunism (English) comes from English leprechaunism, from English leprechaun, from Irish leipreachán, from Middle Irish luchrupán, from Old Irish luchorpán, from Old Irish corp, from Latin corpus, from Proto-Italic korpos — body.

Ancestry of “pseudoleprechaunism”, step by step

pseudoleprechaunism traces back through two separate lines of ancestry.

via English leprechaunism

StepLanguageWordMeaning
1EnglishleprechaunismSynonym of Donohue syndrome
2EnglishleprechaunOne of a race of elves that can reveal hidden...
3Irishleipreachán
4Middle Irishluchrupán
5Old Irishluchorpán
6Old Irishcorpbody; corpse; Eucharist, Communion
7Latincorpusbody, person; substance, material; the flesh of...
8Proto-Italickorposbody
9Proto-Indo-Europeankréposbody
10Proto-Indo-Europeankrep-body

via English pseudo

StepLanguageWordMeaning
1EnglishpseudoAn intellectually pretentious person; a...
2Englishpseudo-False, not genuine, fake
3Ancient Greekψευδήςlying, false, untrue; deceived, beguiled
4Ancient Greek-ήςadjective suffix
5Proto-Indo-European-ēsPrimarily forms adjectival bahuvrīhi compounds
6Proto-Indo-European-ess
7Proto-Indo-European-osCreates action nouns or result nouns from verbs;...
Every word from Proto-Indo-European krep-