köken: From de (“from”) + Old Spanish onde (“whence, from where”), from Latin unde. Replaced Old Spanish o (“where”), from Latin ubi, although the latter survives, in a marginal way, in the form do, which is also prefixed with de.
at, by, near, among · at the house or residence of; chez · before, in the presence of, in the writings of, in view of
köken: Seems connected with ob and ad, thus its strict meaning would be “on to”, “unto”. De Vaan theorizes either a connection with apiō (“to tie”) or a derivation from *ad-pod, formed by the preverb ad (“to”) and the word for "foot", meaning something like "at the foot of" (cf. French chez). The latter option is found in other words such as oppidum.
Apud Helvētiōs longē nōbilissimus fuit et dītissimus Orgetorix.
In prīncipiō erat Verbum et Verbum erat apud Deum et Deus erat Verbum.
at X's abode · in X's view; as X expresses it in their writings
köken: Originally an unstressed form of hus (“house”) undergoing a development in meaning from "at someone's house" to "with someone" – analogous to the development of Latin casa (“house”) to French chez (“at (the house of)”). Displaced Old Norse hjá.
Vi var på besøg hos Svend.
Jeg sov hos en veninde.
Maalet er hos Kierkegaard som hos Hegel et selvbevidst Liv, der af begge kaldes Aand, ...
köken: From Proto-Balto-Slavic *pos, from Proto-Indo-European *pós (“afterwards, post-”). Cognate with Proto-Slavic *pozdь́nъ (“late”), Latin post (“behind, after”).
Inherited from Middle French chez, from Old French chies, from Latin casa (“house”). Doublet of case. The lack of final -e may be due to contraction in unstressed position; however, it has also been explained as the continuation of a Proto-Romance dative-genitive form case (from Latin casae).