Where does “n-ṯ n” come from?

n-ṯ n (Demotic) comes from Egyptian ṯꜣ-n — starting from.

Ancestry of “n-ṯ n”, step by step

Step	Language	Word	Meaning
1	Egyptian	ṯꜣ-n	starting from

n-ṯ n — Etymology, Origin & Word History | Etymology Explorer