Pictish: Cináed mac Ailpín (Modern Gaelic: Coinneach mac Ailpein), commonly anglicised as Kenneth MacAlpin and known in most modern regnal lists as Kenneth I (810 – 13 February 858), was a king of the Picts who, according to national myth, was the first king of Scots. He was thus later known by the posthumous nickname of An Ferbasach, "The Conqueror". The dynasty that ruled Scotland for much of the medieval period claimed descent from him, and the current British monarch, Queen Elizabeth II is descended from him through Malcolm III, Robert the Bruce and James VI and I.

The Kenneth of myth, conqueror of the Picts and founder of the Kingdom of Alba, was born in the centuries after the real Kenneth died. In the reign of Kenneth II (Cináed mac Maíl Coluim), when the Chronicle of the Kings of Alba was compiled, the annalist wrote:

So Kinadius son of Alpinus, first of the Scots, ruled this Pictland prosperously for 16 years. Pictland was named after the Picts, whom, as we have said, Kinadius destroyed. ... Two years before he came to Pictland, he had received the kingdom of Dál Riata.

In the 15th century, Andrew of Wyntoun's Orygynale Cronykil of Scotland, a history in verse, added little to the account in the Chronicle:

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