Commentary for II Kings 15:2

בֶּן־שֵׁ֨שׁ עֶשְׂרֵ֤ה שָׁנָה֙ הָיָ֣ה בְמָלְכ֔וֹ וַחֲמִשִּׁ֤ים וּשְׁתַּ֙יִם֙ שָׁנָ֔ה מָלַ֖ךְ בִּירוּשָׁלִָ֑ם וְשֵׁ֣ם אִמּ֔וֹ יְכָלְיָ֖הוּ מִירוּשָׁלִָֽם׃

He was sixteen years old was he when he began to reign; and he reigned for fifty two years in Jerusalem; and his mother’s name was Jecoliah of Jerusalem.

Metzudat David on II Kings