He starts out trying to avoid Macbeth, hoping that if he is out of sight he will be out of mind. But when this leads to the death of his wife and children anyway, he changes his approach and wants to lead the assault and kill Macbeth himself. In other words, Macbeth changes him from a non-supporter to an active enemy.
Macduff
Both mention birds. Lady MacDuff references the wren, and MacDuff references chickens.
A number of people including Macduff and Ross.
Macduff wins.
Macduff compares Duncan's body to a temple. Lord Macduff is the person who kills Macbeth at the end of the play.
Macduff learns that Macbeth has murdered Macduff's family.
Macduff's first name is not mentioned in Shakespeare's play "Macbeth." He is simply referred to as Macduff throughout the play.
Macbeth is Macduff's enemy. The three witches told Macbeth to beware of Macduff, and Macbeth responded by ordering the deaths of Macduff and all the members of his household. Macduff had already fled to England, however, so Macduff's wife, children, and servants were killed but he wasn't. When Macduff found out, he set out to get revenge.
The prophecy that none of woman born could harm Macbeth. Macbeth wasn't to know that by a technicality, Macduff wasn't "of woman born".
Macduff
Both mention birds. Lady MacDuff references the wren, and MacDuff references chickens.
A number of people including Macduff and Ross.
Macduff wins.
MacDuff Knox is 5' 10".
Macduff's son was created in 1603.
Lady Macduff was created in 1603.
Jack MacDuff was born in 1950.