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What is the Latin etymon of 'que' in the French « ne ... que »?

I am still trying to understand the etymology of the French adverbial 'ne que', and so researched the Latin etymons of these two Functional Morphemes for more sapience.
This question concerns only the meaning in V and VII below.

[ Wiktionary in French :] I. (Conjonction 1) Du latin quia, qui exprime la cause.
II. (Conjonction 2) Du latin quam.
III. (Pronom relatif) Du latin qui, quae, quod ; dans l’ancien français, que devint la forme atone du cas régime, sans distinction de genre ni de nombre.
IV. (Pronom interrogatif) Du latin quid.

[...]  [ V. Adverbe 2 : ] Personne excepté, rien excepté. Seulement. Utilisé avec ne.

[...]  [ VI. Etymology 1 : ] From Latin quia.


[VII.] 2. (used with ne) only
(ne ... que   parses roughly as   "(do[es]) not / nothing ... other than")

Somewhere is at least 1 error, because English Wiktionary classifies 'que' as a Conjunction, but French Wiktionary an adverb.

Anyhow, which is the Latin etymon of the French que?