Spouse's grandnibling's husband.
My grandnephew-by-marriage-in-law is a good person.
by NSBC968755 February 25, 2023
Get the grandnephew-by-marriage-in-lawmug. Spouse's great-grandnephew.
My great-grandnephew-by-marriage is a good person.
by NSBC968755 February 25, 2023
Get the great-grandnephew-by-marriagemug. 
Get the grandnephew-by-marriagemug. Spouse's great-grandnibling's husband.
My great-grandnephew-by-marriage-in-law is a good person.
by NSBC968755 February 25, 2023
Get the great-grandnephew-by-marriage-in-lawmug.