Donna is the daughter of Donnetta.
Donnetta is the granddaughter of Donnetta's sister, Donnita. Donnita has never met Donna. Donnetta is the _______ of Donna's mother.
Found in the Mindstretch Calendar by Terry Stickels
Donetta could also be the husband of Donna's mother.
Donetta being the father of Donna, and obviously having Donna as his daughter.