Easton's 1897 Bible Dictionary:

Zedekiah
   righteousness of Jehovah. (1.) The last king of Judah. He was
   the third son of Josiah, and his mother's name was Hamutal, the
   daughter of Jeremiah of Libnah, and hence he was the brother of
   Jehoahaz (2 Kings 23:31; 24:17, 18). His original name was
   Mattaniah; but when Nebuchadnezzar placed him on the throne as
   the successor to Jehoiachin he changed his name to Zedekiah. The
   prophet Jeremiah was his counsellor, yet "he did evil in the
   sight of the Lord" (2 Kings 24:19, 20; Jer. 52:2, 3). He
   ascended the throne at the age of twenty-one years. The kingdom
   was at that time tributary to Nebuchadnezzar; but, despite the
   strong remonstrances of Jeremiah and others, as well as the
   example of Jehoiachin, he threw off the yoke of Babylon, and
   entered into an alliance with Hophra, king of Egypt. This
   brought up Nebuchadnezzar, "with all his host" (2 King 25:1),
   against Jerusalem. During this siege, which lasted about
   eighteen months, "every worst woe befell the devoted city, which
   drank the cup of God's fury to the dregs" (2 Kings 25:3; Lam.
   4:4, 5, 10). The city was plundered and laid in ruins. Zedekiah
   and his followers, attempting to escape, were made captive and
   taken to Riblah. There, after seeing his own children put to
   death, his own eyes were put out, and, being loaded with chains,
   he was carried captive (B.C. 588) to Babylon (2 Kings 25:1-7; 2
   Chr. 36:12; Jer. 32:4,5; 34:2, 3; 39:1-7; 52:4-11; Ezek. 12:12),
   where he remained a prisoner, how long is unknown, to the day of
   his death.

     After the fall of Jerusalem, Nebuzaraddan was sent to carry
   out its complete destruction. The city was razed to the ground.
   Only a small number of vinedressers and husbandmen were
   permitted to remain in the land (Jer. 52:16). Gedaliah, with a
   Chaldean guard stationed at Mizpah, ruled over Judah (2 Kings
   25:22, 24; jer. 40:1, 2, 5, 6).

     (2.) The son of Chenaanah, a false prophet in the days of Ahab
   (1 Kings 22:11, 24; 2 Chr. 18:10, 23).

     (3.) The son of Hananiah, a prince of Judah in the days of
   Jehoiakim (Jer. 36:12).


Hitchcock's Bible Names Dictionary (late 1800's):

Zedekiah, the Lord is my justice; the justice of the Lord