Great-great-grandparent's brother.
My great-great-granduncle is a good person.
by Hgcloziw November 23, 2019
Get the great-great-grandunclemug. 
Get the great-great-great-grandunclemug. 
Get the half-great-great-grandunclemug. Spouse's great-great-grandaunt's husband.
My co-great-great-granduncle-in-law is a good person.
by JAMP12 September 21, 2021
Get the co-great-great-granduncle-in-lawmug.