Pseudo-Chrysostom
Catena Aurea · Matthäusevangelium 1
So all the generations from Abraham to David are fourteen generations; and from David until the carrying away into Babylon are fourteen generations; and from the carrying away into Babylon unto Christ are fourteen generations.
Or, the same Jeconiah is counted twice in the Gospel, once before the carrying away, and again after the carrying away. For this Jeconiah being one person had two different conditions; before the carrying away he was King, as being made King by the people of God; but he became a private man at the carrying away; hence he is reckoned once among the Kings before the carrying away; and after the carrying away once among private men.