Where does “laymanism” come from?

laymanism (English) comes from English layman, from English lay, from English Lee, from Irish Laoi, from Middle Irish láed, from English loid, from English celluloid, from English cellulose — Forms agent nouns from verbal roots.

Ancestry of “laymanism”, step by step

laymanism traces back through two separate lines of ancestry.

via English layman

StepLanguageWordMeaning
1EnglishlaymanLayperson, someone who is not an ordained cleric...
2EnglishlayTo place down in a position of rest, or in a...
3EnglishLeefor someone who lived near a meadow (the Anglo-Saxon for meadow being ley or leag)
4IrishLaoilay, song
5Middle Irishláed
6EnglishloidA lock-picking tool made from a piece of...
7EnglishcelluloidAny of a variety of thermoplastics created from...
8EnglishcelluloseA complex carbohydrate that forms the main...
9Frenchcellulosecellulose
10Frenchcellulecell; table cell
11Latincellulasmall room, especially that of a slave; humble...
12Latin-ulusUsed to form a diminutive of a noun, indicating...
13Proto-Italic-olos
14Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
15Proto-Indo-European-e-lós
16Proto-Indo-European-lósForms agent nouns from verbal roots

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 -lós