2 Chronicles 34:1

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

Jeremiah 1:2

to whom the word of Jehovah 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 Jehovah which came unto 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 Jehovah, being a child, girded with a linen ephod.

1 Samuel 2:26

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

1 Kings 3:7-9

And now, O Jehovah my God, thou hast 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 Jehovah, and said, O altar, altar, thus saith Jehovah: Behold, a son shall be born unto the house of David, Josiah by name; and upon thee shall he sacrifice the priests of the high places that burn incense upon thee, and men's bones shall they burn upon thee.

2 Kings 22:1-20

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 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 Beer-sheba.

2 Chronicles 26:1

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

2 Chronicles 33:1

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

2 Chronicles 33:25

But 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.

Ecclesiastes 4:13

Better is a poor and wise youth than an old and foolish king, who knoweth not how to receive admonition any more.

Matthew 1:10-11

and Hezekiah begat Manasseh; and Manasseh begat Amon; and Amon begat 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 Beer-sheba.
2 Chronicles 26:1
And all the people of Judah took Uzziah, who was sixteen years old, and made him king in the room of his father Amaziah.
2 Chronicles 33:1
Manasseh was twelve years old when he began to reign; and he reigned fifty and five years in Jerusalem.
1 Samuel 2:18
But Samuel ministered before Jehovah, being a child, girded with a linen ephod.
1 Kings 3:7
And now, O Jehovah my God, thou hast 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.
Ecclesiastes 4:13
Better is a poor and wise youth than an old and foolish king, who knoweth not how to receive admonition any more.

American Standard Version Public Domain