Interesting it says he will be called The mighty God not that he is.

All the verses below say he will be descended from David not a son of God.



Isaiah 9:6 For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counseller, The mighty God, The everlasting Father, The Prince of Peace. (7) Of the increase of his government and peace there shall be no end, upon the throne of David, and upon his kingdom, to order it, and to establish it with judgment and with justice from henceforth even for ever. The zeal of the LORD of hosts will perform this.

Isaiah 16:5 In love a throne will be established; in faithfulness a man will sit on it--one from the house of David--one who in judging seeks justice and speeds the cause of righteousness.

Acts 2:30 But he was a prophet, and he knew God had promised with an oath that one of David's own descendants would sit on his throne.

1 Kings 8:25 Now LORD, God of Israel, keep for your servant David my father the promises you made to him when you said, 'You shall never fail to have a man to sit before me on the throne of Israel, if only your sons are careful in all they do to walk before me as you have done.'

2 Samuel 7:12 When your days are over and you rest with your fathers, I will raise up your offspring to succeed you, who will come from your own body, and I will establish his kingdom.

Psalm 132:11 The LORD swore an oath to David with a promise he will never take back: "I will place one of your descendants on your throne.