Norma was born in Greencastle on January 18, 1936, the daughter of Ira and Jennie (Butler) Moore.
Mrs. Duncan was a graduate of Greencastle High School.
Survivors include four children, Mike Duncan, (wife-Donna), Carmel, Joe Duncan, Indianapolis, Jon Duncan, Indianapolis, and Dina Cripe, (husband-David), Elkhart; 11 grandchildren, 3 great-grandchildren; and several nieces and nephews.
She was preceded in death by her parents; her husband of 44 years, Dorwin Duncan; and three brothers, John, Jack, and Joe Moore.
A private family service and burial will be held in Forest Hill Cemetery at a later date.
Memories may be shared with the family at www.Hopkins-Rector.com.