Where does “と言えば” come from?

と言えば (Japanese) comes from Japanese と, from Old Japanese と, from Proto-Japonic tə, from Proto-Uralic tä — that.

Ancestry of “と言えば”, step by step

と言えば traces back through two separate lines of ancestry.

via Japanese と

StepLanguageWordMeaning
1Japaneseとwith; and; a particle following a phrase or...
2Old Japaneseと—
3Proto-Japonictəplace
4Proto-Uralictäthat

via Japanese 言う

StepLanguageWordMeaning
1Japanese言うto say, to tell somebody; to call, to name, to...
2Proto-Japonicipu—

Words derived from “と言えば”

Every word from Proto-Uralic tä →Every word from Proto-Japonic tə →Every word from Old Japanese と →