She has stated that her stage forename ("Whoopi") was taken from a whoopee cushion; "When you're performing on stage, you never really have time to go into the bathroom and close the door. So if you get a little gassy, you've got to let it go. So people used to say to me, 'You're like a whoopee cushion. ' And that's where the name came from. " She said in 2011, "My mother did not name me Whoopi, but Goldberg is my name, it's part of my family, part of my heritage. Just like being black. " Henry Louis Gates Jr. , in his book In Search of Our Roots: How 19 Extraordinary African Americans Reclaimed Their Past, found that all of Goldberg's traceable ancestors were African Americans, that she has no known German or Jewish ancestry, and that none of her ancestors were named Goldberg. Results of a DNA test, revealed in the 2006 PBS documentary African American Lives, traced part of her ancestry to the Papel and Bayote people of modern-day Guinea-Bissau. Her admixture test indicates that she is of 92 percent sub-Saharan African origin and of 8 percent European origin.