Who had been ... — The antecedent is obviously Kish, though as far as the mere grammar goes it might have been Mordecai.
Jeconiah. — That is, Jehoiachin. (See 2 Kings 24:12-16.)
Nebuchadnezzar ... had carried away. — This was in 598 B.C., 117 years before this time, so that the four generations are readily accounted for.