Yes, Brian, but look at the words found in the Jewish Scripture, (Is 9:5,6) They are quite different from those found in the KJV or the NIV or NABRE, etc. (Is 9:6,7)
5 For a child has been born to us, a son has been given us. And authority has settled on his shoulders. He has been named “The Mighty God is planning grace; The Eternal Father, a peaceable ruler”—
6 In token of abundant authority And of peace without limit Upon David’s Throne and kingdom, That it may be firmly established In justice and equity Now and evermore. The zeal of the LORD of Hosts Shall bring this to pass
Jews understand this passage to be about Hezekiah, son of Ahaz, who was an evil ruler he even worshipped Baal. Isaiah was announcing the birth of Ahaz’ son, Hezekiah. I do think it would be useful to get a translation of the dead sea scrolls since most of Isaiah was preserved. That would, at least give us a glimpse of the text of this passage at the time of Jesus.
Even at that, who can say what God wanted to share with us. Perhaps, he used Ahaz as a backdrop to announce the Good News of his coming!