Asmor said:What are the origins of Tieflings?
David "Zeb" Cook shouted over his cubicle at Wolfgang Baur, and asked him for a good German-derived word for humans with fiendish blood.
Wolfgang Baur said, "tieflings?" From the German teufel, or devil. And history was made.
Tieflings first appeared in the Planescape Campaign Setting in 1994. Aasimars first appeared in The Planewalker's Handbook in 1996, written by Monte Cook.