People : Bryant Duff to Claire Duff
Byron Duff 3 people
Caitlin Duff 2 people
Caleb Duff 2 people
Cameron Duff 2 people
Carl Duff 2 people
Carla Duff 2 people
Carlos Duff 2 people
Carmen Duff 4 people
Carol Duff 10 people
Carole Duff 5 people
Carolina Duff 2 people
Caroline Duff 5 people
Carolyn Duff 12 people
Carrie Duff 3 people
Cassandra Duff 7 people
Catherine Duff 8 people
Cecelia Duff 2 people
Chad Duff 5 people
Charles Duff 36 people
Charlotte Duff 5 people
Chelsea Duff 2 people
Cheryl Duff 7 people
Chester Duff 2 people
Chris Duff 9 people
Christina Duff 9 people
Christine Duff 9 people
Christophe Duff 2 people
Christopher Duff 25 people
Christy Duff 5 people
Claire Duff 2 people