Answer:
2 Kings 23:32 (NIV) – He (Jehoahaz) did evil in the eyes of the Lord, just as his fathers had done.
Yes, you are correct, Josiah was one of the few Godly kings, unlike many before him. 2 Kings 22:1-2 Josiah was eight years old when he began to reign, and he reigned thirty and one years in Jerusalem. And his mother’s name was Jedidah, the daughter of Adaiah of Bozcath. And he did that which was right in the sight of the LORD, and walked in all the way of David his father, and turned not aside to the right hand or to the left.
The Bible often uses the terms “fathers” to refer to grandfathers, great grandfathers, etc. In this case it was referring to Amon (his grandfather), and Manasseh his great grandfather.
2 Kings 21:17-26 Now the rest of the acts of Manasseh, and all that he did, and his sin that he sinned, are they not written in the book of the chronicles of the kings of Judah? And Manasseh slept with his fathers, and was buried in the garden of his own house, in the garden of Uzza: and Amon his son reigned in his stead. Amon was twenty and two years old when he began to reign, and he reigned two years in Jerusalem. And his mother’s name was Meshullemeth, the daughter of Haruz of Jotbah. And he did that which was evil in the sight of the LORD, as his father Manasseh did. And he walked in all the ways that his father walked in, and served the idols that his father served, and worshiped them: And he forsook the LORD God of his fathers, and walked not in the way of the LORD. And the servants of Amon conspired against him, and slew the king in his own house. And the people of the land slew all them that had conspired against king Amon; and the people of the land made Josiah his son king in his stead. Now the rest of the acts of Amon which he did, are they not written in the book of the chronicles of the kings of Judah? And he was buried in his sepulchre in the garden of Uzza: and Josiah his son reigned in his stead.
Very good question
Pastor Brad