Who is Joaquin in the bible?

There is no figure named Joaquin in the Hebrew Bible (Tanakh) or in Jewish scripture. However, this name is very likely a variant spelling or translation of a biblical name — most probably Jehoiachin (also spelled Yehoyachin in Hebrew: יְהוֹיָכִין), a king of Judah, or possibly Jehoiakim (Yehoyakim: יְהוֹיָקִים).

Key Takeaways

"Joaquin" is not itself a biblical name but is likely derived from Jehoiachin or Jehoiakim, kings of Judah.
Jehoiachin (יְהוֹיָכִין) was a king of Judah who was exiled to Babylon by Nebuchadnezzar [2 Kings 24:8–17].
The name "Joaquin" may also derive from Joachim, the Greek/Latin form of Yehoyakim, used in Catholic tradition.
"Joachim" also appears in Jewish apocryphal tradition as the father of Miriam (Mary), though this has no basis in the canonical Tanakh.
The root of all these names is יָהּ (Yah, God) + קוּם (kum, to rise) — meaning "God will establish."

Detailed Answer

The Name's Hebrew Origin

The name Joaquin comes from the Spanish/Portuguese rendering of the Hebrew name יְהוֹיָקִים (Yehoyakim) or יְהוֹיָכִין (Yehoyachin), both of which share the root meaning "God will establish" or "God raises up."

Jehoiachin (יְהוֹיָכִין) — Most Likely Candidate

Jehoiachin was the son of Jehoiakim and king of Judah for a very brief reign — approximately three months around 597 BCE [2 Kings 24:8].

Key facts about him:

He was only 18 years old when he became king (some texts say 8, reflecting a textual variant).
Nebuchadnezzar of Babylon besieged Jerusalem during his reign, and Jehoiachin surrendered and was exiled to Babylon along with thousands of Judeans [2 Kings 24:10–16].
He is mentioned in Babylonian administrative records, making him one of the most archaeologically confirmed biblical figures.
Remarkably, late in his life, the Babylonian king Evil-Merodach released Jehoiachin from prison and elevated him to a place of honor [2 Kings 25:27–30; Jeremiah 52:31–34].
He appears in the genealogy of Jesus in the Christian New Testament [Matthew 1:11–12], which explains why "Joaquin" is a common name in Catholic/Christian Spanish-speaking cultures.

Jehoiakim (יְהוֹיָקִים)

Jehoiakim was Jehoiachin's father and also a king of Judah [2 Kings 23:34–24:6]. He is remembered negatively in the prophetic tradition — the prophet Jeremiah strongly condemned him for his wickedness and burning of prophetic scrolls [Jeremiah 36:23].

"Joachim" in Apocryphal Tradition

In Catholic and Eastern Orthodox tradition, the name Joachim (from Yehoyakim) is given to the father of the Virgin Mary. This comes from the Protoevangelium of James, an apocryphal text. This figure has no basis in the canonical Hebrew Bible or Talmud.

Why the Name Is Common in Spanish Culture

Because the name passed through Greek → Latin (Joachim/Joaquim) → Spanish (Joaquín), it became extremely common in Catholic countries. Many people named Joaquín are unknowingly carrying an ancient Hebrew royal name.

Note: Since no specific sources were retrieved for this question, this answer is based on my training knowledge of Tanakh, biblical history, and etymology.