Where does “illec” come from?

illec (Middle French) comes from Old French iluec, from Latin illōc, from Latin illud, from Latin -ce, from Proto-Italic ke, from Indo-European *ḱe.

illec (Middle French): here

Definitions

Step	Language	Word	Meaning
1	Old French	iluec	herein, in this place
2	Latin	illōc	to that place, there, thither
3	Latin	illud	nominative neuter singular of ille; accusative...
4	Latin	-ce	affixed, usually to demonstratives, forming...
5	Proto-Italic	ke	here
6	Indo-European	*ḱe	—