This paper investigates the nature, role and functions of Bilbo and Frodo's family relationship and the use of seemingly contradictory genealogical terminology within The Lord of the Rings.
"'Uncle me no uncle!’ Or Why Bilbo Is and Isn’t Frodo’s Uncle.,"
Journal of Tolkien Research: Vol. 9:
1, Article 4.
Available at: https://scholar.valpo.edu/journaloftolkienresearch/vol9/iss1/4