Question: In addition to Donalbain, who else is a son of King Duncan in Shakespeare's Macbeth?
Sentence (from "King Duncan"): The origin of the character lies in a narrative of the historical Donnchad mac Crinain, King of Scots, in Raphael Holinshed's 1587 "The Chronicles of England, Scotland, and Ireland," a history of Britain familiar to Shakespeare and his contemporaries.
Relevant evidence: No