Bethoc (Beatrix, Beatrice) MacKenneth, Princess of Scotland, born 984 at Atholl, Perth, Scotland; date of death is uncertain. Bethoc was the eldest daughter of King Malcolm II of Alba (Scotland), who had no sons. The strongest hereditary claim of succession to the Scottish throne therefore passed through Bethoc.
Approximately 1000CE, Princess Bethoc married Crinan the Thane de Mormaer (Earl) of Dunkeld. The first son of this marriage was Duncan Cæn-Mohr MacCrinan, who ascended to the throne of Scotland in 1034.
Early writers have asserted that Malcolm II also designated Duncan as his successor under the rules of tanistry because there were other possible claimants to the throne.
Bethoc's husband was Ughtred of Tynedale, an Anglo-Saxon noble and lord in Northumbria.
However, Bethoc and her descendants did not make a bid for the Scottish throne in two centuries, until 1290 when her descendant John Comyn of Badenoch, heir of William Comyn, son of Hextilda, was one of claimants to the Scottish throne after the death of Margaret of Norway.