Humperdink Duck is the late husband of Grandma Duck (Elvira Coot) and grandfather of Donald Duck. He worked as a farmer in Duckburg. He was the father of three children: Quackmore, Daphne, and Eider Duck. Humperdink Duck appears in person in The Life and Times of Scrooge McDuck and has been referred to in a few other stories. He was known as "Pa Duck". Unlike his wife Elvira, whose parents and even a brother were identified by Don Rosa, who also decided she's the granddaughter of nothing less than the founder of Duckburg,Cornelius Coot, Humperdink's past before having a family with Grandma keeps a mystery. According to Don Rosa, "the Duck family came from the British Isles, probably England".