Rezin in the Bible

1. A king of Syria who harassed the southern kingdom (Judah)

2 Kings 15:37 In those days the LORD began to send against Judah Rezin the king of Syria, and Pekah the son of Remaliah.
2 Kings 16:5-9 Then Rezin king of Syria and Pekah son of Remaliah king of Israel came up to Jerusalem to war: and they besieged Ahaz, but could not overcome him. 6 At that time Rezin king of Syria recovered Elath to Syria, and drave the Jews from Elath: and the Syrians came to Elath, and dwelt there unto this day. 7 So Ahaz sent messengers to Tiglathpileser king of Assyria, saying, I am thy servant and thy son: come up, and save me out of the hand of the king of Syria, and out of the hand of the king of Israel, which rise up against me. 8 And Ahaz took the silver and gold that was found in the house of the LORD, and in the treasures of the king's house, and sent it for a present to the king of Assyria. ...

⇒Bible Encyclopedia for REZIN.

Prophecy against

Isaiah 7:1-9 And it came to pass in the days of Ahaz the son of Jotham, the son of Uzziah, king of Judah, that Rezin the king of Syria, and Pekah the son of Remaliah, king of Israel, went up toward Jerusalem to war against it, but could not prevail against it. 2 And it was told the house of David, saying, Syria is confederate with Ephraim. And his heart was moved, and the heart of his people, as the trees of the wood are moved with the wind. 3 Then said the LORD unto Isaiah, Go forth now to meet Ahaz, thou, and Shearjashub thy son, at the end of the conduit of the upper pool in the highway of the fuller's field; 4 And say unto him, Take heed, and be quiet; fear not, neither be fainthearted for the two tails of these smoking firebrands, for the fierce anger of Rezin with Syria, and of the son of Remaliah. ...
Isaiah 8:4-8 For before the child shall have knowledge to cry, My father, and my mother, the riches of Damascus and the spoil of Samaria shall be taken away before the king of Assyria. 5 The LORD spake also unto me again, saying, 6 Forasmuch as this people refuseth the waters of Shiloah that go softly, and rejoice in Rezin and Remaliah's son; 7 Now therefore, behold, the Lord bringeth up upon them the waters of the river, strong and many, even the king of Assyria, and all his glory: and he shall come up over all his channels, and go over all his banks: ...
Isaiah 9:11 Therefore the LORD shall set up the adversaries of Rezin against him, and join his enemies together;

2. A returned Babylonian captive

Ezra 2:48 The children of Rezin, the children of Nekoda, the children of Gazzam,
Nehemiah 7:50 The children of Reaiah, the children of Rezin, the children of Nekoda,