Adorable Tiny Kitten

The word "kitten" derives from Middle English kitoun (ketoun, kyton etc.), which itself came from Old French chitoun, cheton: "kitten".
The young of big cats are called cubs rather than kittens. Either term may be used for the young of smaller wild felids such as ocelots, caracals, and lynx, but "kitten" is usually more common for these species.