First cousin's great-great-grandson.
My first great-great-great-cousin-nephew is a good person.
by Gtopql November 23, 2019
Get the first great-great-great-cousin-nephewmug. 
Get the great-great-great-nephewmug. Nephew-in-law (only spouse's nephew).
My nephew-by-marriage is a good person.
by QWP998756 October 15, 2021
Get the nephew-by-marriagemug. My sesqui-great-cousin-nephew is a good person.
by Hgcloziw November 23, 2019
Get the sesqui-great-cousin-nephewmug. My step-great-nephew is a good person.
by Elivaldeq November 24, 2019
Get the step-great-nephewmug. 
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.