2 Chronicles 34:1

Josiah was eight years old when he became king, and he reigned thirty-one years in Jerusalem; and his mother’s name was Jedidah the daughter of Adaiah of Bozkath.

to whom the word of Yahweh came in the days of Josiah the son of Amon, king of Judah, in the thirteenth year of his reign.

“From the thirteenth year of Josiah the son of Amon, king of Judah, even to this day, these twenty-three years the word of Yahweh has come to me, and I have spoken to you, rising up early and speaking, but you have not listened.

The word of Yahweh which came to Zephaniah son of Cushi, son of Gedaliah, son of Amariah, son of Hezekiah, in the days of Josiah son of Amon, king of Judah:

Josiah Reigns over Judah