Where does “diaper library” come from?

diaper library (English) comes from English library, from Middle English librarie, from Anglo-Norman French librarie, from Old French librairie, from Latin librarium, from Latin librarius, from Latin Līber, from Old Latin loeber — shoe.

Ancestry of “diaper library”, step by step

diaper library traces back through two separate lines of ancestry.

via English library

StepLanguageWordMeaning
1EnglishlibraryAn institution which holds books and/or other...
2Middle Englishlibrarielibrary, reading room; bookshelf, bookcase;...
3Anglo-Norman Frenchlibrarie
4Old Frenchlibrairielibrary
5Latinlibrariuma bookcase; a library
6Latinlibrariusof or pertaining to books; a scribe, copyist,...
7LatinLīber
8Old Latinloeber
9Frenchloberto lob
10Frenchloblob
11EnglishlobTo throw or hit a ball into the air in a high...
12EnglishlongHaving much distance from one terminating point...
13EnglishlongitudeAngular distance measured west or east of the...
14Old Frenchlongitude
15Latinlongitūdōlength, longitude; longness
16Latinlongusfar, long; extended, prolonged; long; tedious,...
17Latinly; used to form adverbs from adjectives
18Latindis-asunder, apart, in two; reversal, removal;...
19Latincalceusshoe

via English diaper

StepLanguageWordMeaning
1EnglishdiaperA textile fabric having a diamond-shaped pattern...
2Middle EnglishdyaperFabric with repetitive patterns of shapes or...
3Old Frenchdyapre
4Latindiaspra
5Greekδίασπρος
Every word from Latin calceus
diaper library — Etymology, Origin & Word History | Etymology Explorer