Isaiah 14:22 - Ellicott's Commentary On The Whole Bible

Son, and nephew... — The latter word, as throughout the Bible, is used in its true sense as “grandson,” or “descendant.” (Comp. 1 Timothy 5:4.) Every word that could express descent is brought together to express the utter extirpation of the Babylonian dynasty. The Hebrew adds the emphasis of alliteration, as in our “bag and baggage,” and other like phrases.