Jehoahaz son of Josiah became king at age 27 and reigned for three months [(II Kings 22:31. And in Tzeda LaDerech and Yesod Olam they wrote six months, and Tisha B'Av, and in Seder Olam they completely omitted it)], and they anointed him. He did not need anointing except because Jehoiakim his brother was two years older than him [(Rashi). And in Divrei HaYamim II the sons of Josiah: the firstborn Yochanan, the second Jehoiakim, the third Zedekiah, the fourth Shallum.

He is Zedekiah, he is Yochanan, he is Jehoahaz (Horayot 11b and similarly Keritot 5b).

And the Ra'avad wrote that Yochanan was the firstborn but did not reign, and Shallum is Jehoahaz, and he brought proof from what is written in Yirmiyahu 25 "Thus said HaShem to Shallum son of Josiah king of Judah," and the Radak explained that Shallum is Jehoiachin]. And he was taken by Pharaoh Necho and brought to Egypt and died there [(Tzeda LaDerech)]. Chilkiah was Yirmiyahu's 22nd descendant, prophet.

Jehoiakim, he is Eliakim son of Josiah whom Pharaoh Necho made king and changed his name to Jehoiakim. He became king at age 25 in Year 3316 and reigned for 11 years [(II Kings 22)] (until Year 3327, Seder Olam). And they first made Jehoahaz king even though he was two years younger than him [(Horayot 11b)] because he filled his father's place. And at the beginning of his reign Yirmiyahu and Uriah prophesied against him.

And Jehoiakim killed the prophet Uriah by the sword [(Yirmiyahu 27) Tzeda LaDerech]. Azariah was Yirmiyahu's 22nd descendant, and Uriah the prophets [(and in Shir HaShirim chapter 19 b it writes that Baruch was also)], thus 12 generations [(Seder Olam)]. They say that Jehoiakim stood imprisoned in Babylon for 37 years. In his days Yechezkel the prophet was exiled to Babylon and stood in prison for five years, and when he was thirty years old he wrote his book.

And some say that he did not write his book but rather other sages, and he was very handsome, and he was killed by Jews, and he was buried in the grave of Shem son of Noach [(Shir HaShirim) (see Year 3352)].

Yirmiyahu received from Zephaniah in Year 3316 [(see Year 3298)].