Where does “d” come from?

d (Latin) comes from Etruscan 𐌃, from Ancient Greek δ, from Phoenician 𐤃, from Egyptian 𓉿.

Ancestry of “d”, step by step

Step	Language	Word	Meaning
1	Etruscan	𐌃	de
2	Ancient Greek	δ	Lower case delta (δέλτα), the fourth letter of Greek alphabet. It represented in Ancient Greek a voiced dental plosive: and in modern Greek a voiced dental fricative:. It is preceded by γ and followed by ε
3	Phoenician	𐤃	dalet; daleth
4	Egyptian	𓉿	—