Which character in William Shakespeare's "Macbeth" is Lady Macduff  the wife of 
Lady Macduff:  She is the wife of Lord Macduff, the Thane of Fife, and the mother of an unnamed son and other children. Macduff (Macbeth): Lord Macduff, the Thane of Fife, is a character in William Shakespeare's "Macbeth" (c.1603–1607).
Lord Macduff