'Boy's' in the Bible

Jonathan, Saul’s son, had a son whose feet were crippled. He was five years old when the news [of the deaths] of Saul and Jonathan came from Jezreel. And the boy’s nurse picked him up and fled; but it happened that while she was hurrying to flee, he fell and became lame. His name was Mephibosheth.

and He sent word through Nathan the prophet, and he named him Jedidiah (beloved of the Lord) for the sake of the Lord [who loved the child].

Now at the turn of the year [in the spring], King Nebuchadnezzar sent word and had him brought to Babylon with the valuable articles of the house of the Lord, and made his brother Zedekiah king over Judah and Jerusalem.