Where does “D” come from?

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

Ancestry of “D”, step by step

Step	Language	Word	Meaning
1	Latin	d	—
2	Etruscan	𐌃	de
3	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
4	Phoenician	𐤃	dalet; daleth
5	Egyptian	𓉿	—