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Catalan

From Latin qui, from Old Latin quei, from Proto-Italic *kʷoi, from Proto-Indo-European *kʷos, *kʷis.

French

From Middle French qui, from Old French qui, from Latin quī, from Old Latin quei, from Proto-Italic *kʷoi, from Proto-Indo-European *kʷos, *kʷis.

Italian

From Vulgar Latin *(ec)cu hic, from Latin eccum + hīc, from hic, ultimately from Proto-Indo-European *ǵʰi-ḱe (this, here).

Latin

From Old Latin quei, from Proto-Italic *kʷoi, from Proto-Indo-European *kʷis, *kʷos.

Middle French

From Old French qui, from Latin quī, from Old Latin quei, from Proto-Italic *kʷoi, from Proto-Indo-European *kʷos, *kʷis.

Old French

From Latin quī, from Old Latin quei, from Proto-Italic *kʷoi, from Template:ihh, *kʷis.

Portuguese