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. The grandson-in-law of one's spouse's sibling.
My co-grandnephew-in-law is a good person.
by Elivaldeq November 24, 2019
Get the co-grandnephew-in-lawmug.