2 Kings 15:5, 32

And the LORD struck (afflicted) the king, and he was a leper until the day of his death, and lived in a separate house. Jotham the king’s son was in charge of the household, judging the people of the land. [2 Chr 26:16-21]

In the second year of Pekah the son of Remaliah king of Israel, Jotham the son of Uzziah king of Judah became king.