Where does “である” come from?

である (Japanese) comes from Japanese で, from Japanese ぜ, from Japanese ぞえ, from Japanese え, from Middle Chinese 衣.

である (Japanese): To be: the copula, with the same function as だ and its polite form です

Definitions

  1. To be: the copula, with the same function as だ and its polite form です

Ancestry of “である”, step by step

である traces back through two separate lines of ancestry.

via Japanese で

StepLanguageWordMeaning
1Japaneseでat; with, by, using; indicating the following...
2Japaneseぜsentence-ending particle signifying emphasis,...
3Japaneseぞえ­ sentence-ending particle signifying emphasis, used to lightly press one's point, with affectionate overtones
4JapaneseえAlternative form of い
5Middle Chinese衣—

via Japanese あります

StepLanguageWordMeaning
1Japaneseあります—
2Japaneseある有る, 在る to exist; 有る, 在る to happen
3Proto-Japonicarito exist, to be; to have

Words derived from “である”

Every word from Middle Chinese 衣 →Every word from Japanese え →Every word from Japanese ぞえ →