Spouse's grandnibling's husband.
My co-grandnephew-in-law is a good person.
by Wonbig October 13, 2021
Get the co-grandnephew-in-lawmug. My great-great-grandnephew-in-law is a good person.
by JAMP12 September 21, 2021
Get the great-great-grandnephew-in-lawmug. 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-grandniece's husband.
My co-great-grandnephew-in-law is a good person.
by JAMP12 September 21, 2021
Get the co-great-grandnephew-in-lawmug. 
Get the step-co-grandnephew-in-lawmug. 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. 
Get the co-grandnephew-in-lawmug.