0 the child of your grandchild (= the child of your son or daughter):
We have two grandchildren and one great-grandchild.
He was the great-grandchild of Van Gogh.
When she has trouble sleeping, she runs through the names of her 36 grandchildren and great-grandchildren.
There were two surviving great-grandchildren of Queen Victoria.
Her grandchildren and great-grandchildren still live in Rayon Park.
My great-grandchild has not yet had a specific important influence on me; he is all of one and a half.
There are 12 grandchildren and three great-grandchildren and a fourth great-grandchild is due soon.
This raises the question on consanguinity and means that marriage between a person and his great-grandchild is illegal.
One of them has produced one great-grandchild.
He has a new great-grandchild.
