- (5th BC Attic): IPA: /lýŋkʰs/
- (1st BC Egyptian): IPA: /lýŋkʰs/
- (4th AD Koine): IPA: /lýŋxs/
- (10th AD Byzantine): IPA: /lýŋks/
- (15th AD Constantinopolitan): IPA: /líŋks/
Probably from Proto-Indo-European *lewk- (“white; light; bright”), because of the cat's glowing eyes and ability to see in the dark. Cognates include Ancient Greek λευκός (leukós), Sanskrit रोचते (rocate), Middle Persian 𐭩𐭥𐭬 (rōz [YWM], “day”) and Old English noun lēoht (English light).
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Related to Latin lugeo.