The House of Alpin, also known as the Alpinid dynasty, Clann Chináeda, and Clann Chinaeda meic Ailpín, was the kin-group which ruled in Pictland, possibly Dál Riata, and then the kingdom of Alba from Constantine II (Causantín mac Áeda) in the 940s until the death of Malcolm II (Máel Coluim mac Cináeda) in 1034.
Kings traced their descent from Kenneth MacAlpin (and not from his father, Alpín mac Echdach), and Irish genealogies in the Book of Ballymote and the Book of Lecan refer to the kindred as Clann Cináeda meic Ailpín by prioritising descent from Kenneth.
[4] The associated idea that Kenneth had been a king in Dál Riata before he contended successfully for power in Pictland in the 840s, following the death of Eóganán mac Óengusa, is supported by nearly contemporary evidence.
Internecine strife in the late tenth and early eleventh centuries left the descendants of Constantine I unchallenged by male-line descendants of Kenneth MacAlpin, but Malcolm II left no male heirs.
Future kings, while still tracing their descent from Kenneth, were descended from Malcolm's daughter Bethóc and her husband Crinan of Dunkeld.