The spouse of one's great-grandchild.
My great-grandchild-in-law is a good person.
by Rwopazaq November 24, 2019
Get the great-grandchild-in-lawmug. Great-great-grandchild's spouse.
My great-great-grandchild-in-law is a good person.
by Gerald128 April 7, 2021
Get the great-great-grandchild-in-lawmug. 
Get the step-great-grandchild-in-lawmug. The spouse of one's great-great-grandchild.
My great-great-grandchild-in-law is a good person.
by Rwopazaq November 24, 2019
Get the great-great-grandchild-in-lawmug. 
Get the great-grandchild-in-lawmug.