Spouse's great-grandnibling's wife.
My great-grandniece-by-marriage-in-law is a good person.
by NSBC968755 February 25, 2023
Get the great-grandniece-by-marriage-in-lawmug. 
Get the great-grandniecemug. 
Get the grandniece-by-marriagemug. My great-great-grandniece-in-law is a good person.
by Wonbig October 13, 2021
Get the great-great-grandniece-in-lawmug. Great-great-great-great-great-great-grandniece.
My 7X-grandniece is a good person.
by N8953SW June 26, 2021
Get the 7X-grandniecemug.