Where does “where” come from?

where (Middle English) comes from Old English hwǣr, from Old English -a, from Proto-Germanic -ō, from Proto-Germanic -ô, from Proto-Indo-European -ō — Derives nouns from roots.

Ancestry of “where”, step by step

Step	Language	Word	Meaning
1	Old English	hwǣr	where
2	Old English	-a	Ending forming adverbs; nominative masculine...
3	Proto-Germanic	-ō	Creates feminine nouns from roots and stems
4	Proto-Germanic	-ô	-ly; Forms agent nouns, often from the zero-grade...
5	Proto-Indo-European	-ō	Derives nouns from roots

Words derived from “where”

widewhere

Every word from Proto-Indo-European -ō →Every word from Proto-Germanic -ô →Every word from Old English -a →