Where does “whereof” come from?

Whereof derives from Middle English wherof, combining Old English hwǣr (where) and oþ (off), ultimately tracing to Proto-Indo-European h₂epo (off, away from) and h₁ey- (to go).

whereof (English): Of what; Of which; Of whom

Definitions

  1. Of what; Of which; Of whom

Ancestry of “whereof”, step by step

whereof traces back through two separate lines of ancestry.

via English where

StepLanguageWordMeaning
1EnglishwhereWhile on the contrary; although; whereas; At or...
2Middle Englishwherwhere
3Old Englishhwǣrwhere
4Old English-aEnding forming adverbs; nominative masculine...
5Proto-GermanicCreates feminine nouns from roots and stems
6Proto-Germanic-ly; Forms agent nouns, often from the zero-grade...
7Proto-Indo-EuropeanDerives nouns from roots

via English of

StepLanguageWordMeaning
1EnglishofAPI; Expressing distance or motion; "Expressing...
2Middle Englishofof; off; until
3Old Englishofof, from, off, out of
4Old Englishæfof
5Proto-Germanic*ab
6Proto-Indo-Europeanapó
Every word from Proto-Indo-European Every word from Proto-Germanic Every word from Old English -a