[Macbeth] Donalbain is a character in William Shakespeare`s Macbeth (c.1603-1607). He is the younger son of King Duncan and brother to Malcolm, the heir to the throne. Donalbain flees Scotland after the murder of his father for refuge in Ireland. He is based upon a personage in an account of King Duncan in Holinshed`s Chronicles, a history ... Found on http://en.wikipedia.org/wiki/Donalbain_(Macbeth)