Jeconiah was only king for 3 months and had no children. He was only 18 and totally evil. God squished him like a bug. He was deposed by Nebuchadnezzar and hauled off to Babylon as a captive. Nebuchadnezzar then installed Jeconiah's uncle Zedekiah as king. So, the passage "For no man of his (Jeconiah) descendants will prosper sitting on the throne of David or ruling again in Judah.’” is true. Jeconiah had no descendants. It can get confusing because he was also named Jehoiachin and that's the more common name used by many historians.
A few years later, Zedekiah rebelled against Babylon and Nebuchadnezzar came back and crushed Judah. Zedekiah was forced to watch as his sons were executed. Then he was blinded and hauled to Babylon in chains. He died in captivity. Judah was left in ruins and it was 100 years before rebuilding was started.
Jeconiah is in the genealogy of JESUS...
"...A man's rights rest in three boxes: the ballot box, the jury box and the cartridge box..." Frederick Douglass, 1867
