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. 
Get the half-great-great-grandnephewmug. My 3X-grandnephew is a good person.
by KL198 June 25, 2021
Get the 3X-grandnephewmug. Great-great-great-great-great-great-great-great-great-grandnephew.
My 10X-grandnephew is a good person.
by N8953SW June 26, 2021
Get the 10X-grandnephewmug. My step-great-grandnephew is a good person.
by User655 July 25, 2021
Get the step-great-grandnephewmug. Spouse's great-great-grandniece's husband.
My co-great-great-grandnephew-in-law is a good person.
by JAMP12 September 21, 2021
Get the co-great-great-grandnephew-in-lawmug.