chaton

kitten, kitty (baby cat); catkin

First attested in the 1530s in Middle French; by surface analysis, chat (“cat”) + -on (forming diminutives). Compare English catkin.

collet, bezel (around a jewel, on a ring); the jewel itself (around which the collet is, on a ring)

Inherited from Middle French chaton, chaston, from Old French chastun (“the projecting part of a ring embedded with a stone”), from Frankish *kastō (“box, case”), from Proto-Germanic *kastô, *kasô, *kasą, *kazą (“vessel, container, pitcher, barrel”). Cognate with Old High German kasto (“box, case”) (Modern German Kasten), Dutch kast (“cupboard, case”), Old English castenere (“cabinet, chest”), Old Norse kass, kassi (“basket”), Gothic 𐌺𐌰𐍃 (kas, “vessel, container”), Old High German char (“vess