Anyway! There's only one photo of "William de Rothschild" that exists anywhere online that I can find, and it's a photo of him as a teenager (above, on the right). The other pics (above, on the left) are police sketches of how witnesses described D.B. Cooper.
The timing does line up...
The D.B. Cooper airplane heist and parachute escape on the flight from Portland, Oregon was in 1971, when William Kaufman was 33 years old.
William Kaufman is from Oregon and he lived there until his disappearance in the 1970s.
After he disappeared in the 1970s and his family in Oregon assumed he was dead, William Kaufman bought the home on Lookout Mountain. He then legally changed his name to William de Rothschild in 1985. He then bought tons of real estate in Laurel Canyon with cash and built a huge fortune.