Where does “それだから” come from?

それだから (Japanese) comes from Japanese だから, from Japanese だ, from Japanese である, from Japanese で, from Japanese ぜ, from Japanese ぞえ, from Japanese え, from Middle Chinese 衣.

それだから (Japanese): from that, thus

Definitions

from that, thus

Ancestry of “それだから”, step by step

それだから traces back through two separate lines of ancestry.

via Japanese だから

Step	Language	Word	Meaning
1	Japanese	だから	Used other than with a figurative or idiomatic...
2	Japanese	だ	Following parts of speech that do not inflect by...
3	Japanese	である	To be: the copula, with the same function as だ and its polite form です
4	Japanese	で	at; with, by, using; indicating the following...
5	Japanese	ぜ	sentence-ending particle signifying emphasis,...
6	Japanese	ぞえ	sentence-ending particle signifying emphasis, used to lightly press one's point, with affectionate overtones
7	Japanese	え	Alternative form of い
8	Middle Chinese	衣	—

via Japanese それ

Step	Language	Word	Meaning
1	Japanese	それ	that one near you; the one we are talking about;...
2	Japanese	れ	nominalizing suffix used to form pronouns, often...
3	Old Japanese	れ	nominalizing suffix used to form pronouns, often from demonstratives: one, thing

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