2 Chronicles 34:1

Josiah was eight years old when he began to reign, and he reigned thirty-one years in Jerusalem.

Jeremiah 1:2

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

Zephaniah 1:1

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

1 Samuel 2:18

But Samuel ministered before LORD, being a child, girded with a linen ephod.

1 Samuel 2:26

And the child Samuel grew on, and increased in favor both with LORD, and also with men.

1 Kings 3:7-9

And now, O LORD my God, thou have made thy servant king instead of David my father. And I am but a little child; I know not how to go out or come in.

1 Kings 13:2

And he cried against the altar by the word of LORD, and said, O altar, altar, thus says LORD: Behold, a son shall be born to the house of David, Josiah by name. And upon thee shall he sacrifice the priests of the high places that b

2 Kings 22:1-20

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

1 Chronicles 3:14-15

Amon his son, Josiah his son.

2 Chronicles 24:1

Joash was seven years old when he began to reign, and he reigned forty years in Jerusalem. And his mother's name was Zibiah, of Beersheba.

2 Chronicles 26:1

And all the people of Judah took Uzziah, who was sixteen years old, and made him king in the place of his father Amaziah.

2 Chronicles 33:1

Manasseh was twelve years old when he began to reign, and he reigned fifty-five years in Jerusalem.

2 Chronicles 33:25

But the people of the land killed all those who had conspired against king Amon. And the people of the land made Josiah his son king in his stead.

Matthew 1:10-11

and Hezekiah begot Manasseh, and Manasseh begot Amon, and Amon begot Josiah,

Treasury of Scripture Knowledge

Summary

Josiah was eight years old when he began to reign, and he reigned in Jerusalem one and thirty years.

Bible References

Eight years

2 Chronicles 24:1
Joash was seven years old when he began to reign, and he reigned forty years in Jerusalem. And his mother's name was Zibiah, of Beersheba.
2 Chronicles 26:1
And all the people of Judah took Uzziah, who was sixteen years old, and made him king in the place of his father Amaziah.
2 Chronicles 33:1
Manasseh was twelve years old when he began to reign, and he reigned fifty-five years in Jerusalem.
1 Samuel 2:18
But Samuel ministered before LORD, being a child, girded with a linen ephod.
1 Kings 3:7
And now, O LORD my God, thou have made thy servant king instead of David my father. And I am but a little child; I know not how to go out or come in.