In the TV show "Mad Men", what was Donald Draper's birthname?

In the TV show Mad Men, Donald Draper's birth name was Richard "Dick" Whitman. Dick Whitman was a fictional character created to protect Don Draper's true identity. Early in his life, Don experienced a tragic accident during the Korean War where his commanding officer, Lieutenant Donald Draper, was killed. Seizing the opportunity, Dick switched dog tags with the deceased officer, assuming his identity and leaving his past life behind. This decision led Dick to become Don Draper, a successful advertising executive in New York City, and the birth name Richard Whitman was left behind as a part of his transformation and attempt to escape his troubled past.