Dennison "Denny" Duquette, Sr. is the father of Izzie Stevens' fiancé, Denny Duquette, Jr..
After Denny's death, he visited Izzie Stevens to find out the full story of how his son died and how he managed to propose to a woman like Izzie on the day that he died. He accused her of wanting him for his money. After she explained, he gave her an envelope which held a check for $8,700,000.
Denny Duquette, Sr. married and had one son who was named after himself.
When his son was diagnosed, he and his wife were devastated. One day, Denny disappeared, leaving a note that he didn't want them to have to watch him die. They assumed he was dead until he left them a voicemail saying he'd gotten a new heart and was engaged. ("What I Am")
Notes and Trivia
- According to him, Denny's type was smart, dark-haired girls.