Where does “مِلِّیَّت” come from?

مِلِّیَّت (Ottoman Turkish) comes from Ottoman Turkish ملت, from Arabic مِلَّة — nation, religion; religious community.

Ancestry of “مِلِّیَّت”, step by step

Step	Language	Word	Meaning
1	Ottoman Turkish	ملت	nation, people
2	Arabic	مِلَّة	nation, religion; religious community