Of Scottish origin: Anglicized form of two different Gaelic names, Cinaed and Cainnech. The former was the Gaelic name of Kenneth mac Alpin (d. 858), first king of the united Picts and Scots. The latter survives today in Scotland as the common Gaelic name Coinneach. Since early in the 20th century Kenneth has been in regular use and enjoyed great popularity as a given name well beyond the borders of Scotland.
English and German: topographic name from Old English land, Middle High German lant, ‘land’, ‘territory’.This had more specialized senses in the Middle Ages, being used to denote the countryside as opposed to a town or an estate.