Oreo was born out of a sibling rivalry between two baker brothers, Jacob and Joseph Loose. The tension deepens that they ended up running rivalry bakery companies. It was developed by Joseph’s company, Nabisco, which was inspired by the Hydrox cookie of Jacob’s company, Loose-Wiles Biscuit. Hydrox was thriving to consumers but in the 1950s, Oreo relaunched with better marketing strategy. Nabisco started a marketing license on Oreo for use in other products, like Cookies and Cream ice cream which made them the world’s most popular cookie today.
Source: https://www.businessinsider.com/how-the-oreo-went-from-knock-off-to-worlds-favorite-2020-8