Definition of "great-nephew" []

• Grandson of one's sibling or sibling's spouse, son of one’s nephew or niece, one's sibling's child's male child. (noun)
• One's son’s or daughter's nephew. (noun)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "Dr.I. Milo Shepard, is a great-nephew of Jack London, and grandson of Eliza London Shepard, Jack London's stepsister and ranch superintendent."
• "Unless you were talking about Aleksey Tolstoy, the minor writer and great-nephew of Lev."
• "They're all overshadowed, really, by Octavian, the man who will become Caesar Augustus, the first true emperor, you know, Julius Caesar's adopted son, his real great-nephew."