Levi. This care to give these genealogies after the captivities was to show that God's promises to preserve the nation would be faithfully kept. Compare Jeremiah 23:5; Jeremiah 23:6.
Gershon. Compare Exodus 6:16. The Western Massorite spelling; the eastern spelling being "Gershom".
Kohath. The second son placed first because Aaron descended from him.