Two and twenty years. See note on 2 Chronicles 22:2.
Ahaziah. Note that Ahaziah, Joash, and Amaziah, omitted in Matthew 1:8, all died violent deaths (2Ki 9:27. 2 Kings 12:20; 2 Kings 14:19).
daughter. Put by Figure of speech Synecdoche (of Genus), for grand-daughter; and even for successors not in descent by blood.