Definition of "great-great-grandson" []

• The son of one's great-grandchild. (noun)

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• "Survivors include 10 grandchildren; 21 great-grandchildren; and a great-great-grandson."
• "What else would you expect from the great-great-grandson of Albert Einstein?"
• "Matthew Chapman is the great-great-grandson of Charles Darwin, author of two books, and writer and director of the new film 'The Ledge' starring Liv Tyler, Charlie Hunnam, Terrence Howard, and Patrick Wilson."