The daughter of one's great-grandchild.

The son of one's great-grandchild.

A child of a great-grandchild. A grandchild of a grandchild.

plural of grandaddy

(rare, nonstandard) the grandfather of one's grandson- or granddaughter-in-law; that is, the grandfather of one spouse in relation to the grandparents of the other spouse.

the father of one's son- or daughter-in-law, as common grandfather of their children; the relationship between men who have grandchildren in common; maternal grandfather vis-à-vis paternal grandfather.

the mother of one's son- or daughter-in-law, as common grandmother of their children; the relationship between women who have grandchildren in common; maternal grandmother vis-à-vis paternal grandmother.

plural of grandbaby

plural of granda

A grandmother of one's spouse.