Donalbain (Macbeth)
He is the younger son of King Duncan and brother to Malcolm, the heir to the throne.[1] He is ultimately based on the historical King Donald III of Scotland.His name is derived from the Scottish Gaelic Dòmhnall Bàn, "Donald the Fair."Historically, Donaldbain (Donald Ban/Donald the Fair) seized the Scottish throne after the death of Malcolm and reigned intermittently a few years but was ultimately succeeded by Malcolm's son Edgar.The ending of Roman Polanski's film adaptation of Macbeth, in which Donaldbain, returning to Scotland after the death of Macbeth, hears the witches murmuring in the heather and gets off his horse to investigate, alludes to the historical fact that Donald III seized the throne after the death of Malcolm.