Where does “whatevers” come from?

whatevers (English) comes from English whatever, from English what, from Middle English what, from Old English hwæt, from Old English -ing, from Old English -tūn, from Old English tūn, from Proto-West Germanic tūn — smoke; mist, haze.

Ancestry of “whatevers”, step by step

whatevers traces back through two separate lines of ancestry.

via English whatever

StepLanguageWordMeaning
1EnglishwhateverNo matter what; for any; Anything that; Anything
2EnglishwhatWhich thing, event, circumstance, etc.: used...
3Middle Englishwhatwhat
4Old Englishhwætwhat; why; how many or how much
5Old English-ingForming nouns from verbs, indicating action,...
6Old English-tūnhomestead, village, town
7Old Englishtūnenclosure, yard; place; dwelling
8Proto-West Germanictūnfence
9Proto-Germanictūnąfence; enclosure
10Gaulishdunumfort; hill, hillfort
11Proto-Celticdūnomstronghold, rampart
12Proto-Indo-Europeandʰewh₂-smoke; mist, haze

via English S

StepLanguageWordMeaning
1EnglishSThe ordinal number nineteenth, derived from this...
Every word from Proto-Indo-European dʰewh₂-
whatevers — Etymology, Origin & Word History | Etymology Explorer