Sibling's great-great-great-grandson.
My great-great-great-great-nephew is a good person.
by Gtopql November 23, 2019
Get the great-great-great-great-nephewmug. 
Son of their maternal first cousin’s child with the paternal first cousin’s child or double-first cousin’s grandson.
My double-first great-cousin-nephew is a good person.
by Hgcloziw November 23, 2019
Get the double-first great-cousin-nephewmug. 
Get the great-cousin-nephewmug. 
Get the great-great-great-nephewmug. 
Get the half-great-great-great-nephewmug.