Oreo, which was born in 1912, quickly became the best-selling sandwich cookie in the United States as soon as it was launched. How did the name Oreo come about? People can't explain it anymore. Some believe the name Oreo comes from the French word for "gold" because of the color of the original Oreo packaging. Others believe that Oreo cookies have a hill-like shape on them, and the Greek word for "mountain" is "Oreo." Some people think that the reason why it is called so is because of the simple pronunciation of "Oreo".