2 Kings 22:1

Josiah was eight years old when he began to reign, and he reigned thirty-one years in Jerusalem. The name of his mother [was] Jedidah the daughter of Adaiah from Bozkath.

Joshua 15:39

Lachish, Bozkath, Eglon,

1 Kings 13:2

Then he proclaimed against the altar by the word of Yahweh and said, "O altar, altar, thus says Yahweh: 'Look, a son will be born to the house of David, Josiah by name, and he shall sacrifice on you the priests of the high places who burn incense on you, and human bones shall burn on you.'"

2 Kings 11:21

Jehoash [was] {seven years old} when he began to reign.

2 Kings 21:1

Manasseh was twelve years old when he began to reign, and he reigned fifty-five years in Jerusalem. The name of his mother [was] Hephzibah.

2 Chronicles 34:1-33

Josiah [was] eight years old when he became king, and he reigned thirty-one years in Jerusalem.

Psalm 8:2

From the mouth of children and infants you have founded strength on account of your enemies, to silence [the] enemy and [the] avenger.

Ecclesiastes 10:16

Woe to you, O land, when your king is a youth and your princes feast in the morning.

Isaiah 3:4

And I will make boys their princes, and children shall rule over them.

Jeremiah 1:2

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

Zephaniah 1:1

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

Matthew 1:10

and Hezekiah became the father of Manasseh, and Manasseh became the father of Amon, and Amon became the father of Josiah,

Treasury of Scripture Knowledge

Summary

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 Boscath.

General references

Bible References

Eight years old

2 Kings 11:21
Jehoash [was] {seven years old} when he began to reign.
2 Kings 21:1
Manasseh was twelve years old when he began to reign, and he reigned fifty-five years in Jerusalem. The name of his mother [was] Hephzibah.
Psalm 8:2
From the mouth of children and infants you have founded strength on account of your enemies, to silence [the] enemy and [the] avenger.
Ecclesiastes 10:16
Woe to you, O land, when your king is a youth and your princes feast in the morning.
Isaiah 3:4
And I will make boys their princes, and children shall rule over them.

General references

2 Kings 11:21
Jehoash [was] {seven years old} when he began to reign.