Where does “aquel” come from?

aquel (Fala) comes from Old Portuguese aquel, from Vulgar Latin *eccum ille, from Latin eccum, from Latin ecce, from Latin -ce, from Proto-Italic ke, from Indo-European *ḱe.

aquel (Fala): that

Definitions

that

Ancestry of “aquel”, step by step

Step	Language	Word	Meaning
1	Old Portuguese	aquel	—
2	Vulgar Latin	*eccum ille	—
3	Latin	eccum	behold him; here!, look!
4	Latin	ecce	see!, look!, behold!, points out something with...
5	Latin	-ce	affixed, usually to demonstratives, forming...
6	Proto-Italic	ke	here
7	Indo-European	*ḱe	—

Every word from Indo-European *ḱe →Every word from Latin -ce →Every word from Proto-Italic ke →