Aunt Jemima was the creation of an advertising agency, at a time when well-to-do Americans still employed household servants, who were often, perhaps usually, black. But there have been legitimate black names in advertising, and it is "un-PC" now to mention them. There is a brand of rice products called Uncle Ben's, and at the time of the national election campaign, Uncle Ben and Aunt Jemima were trotted out as examples of "Uncle Tom" figures. I went to a black political discussion site to straighten them out about Uncle Ben, and did not get a warm reception.
Uncle Ben was a farmer in Texas in the 1880s & -90s, in the east Texas, Louisiana rice belt. His rice was so consistently a high-grade product that it became a by-word. People who wished to tout their own rice would say that it was "as good as Uncle Ben's." Today, his image still appears on the packaging of the company that copyrighted the name, and unlike Aunt Jemima, whose image has been updated, his remains the same.
Racist stereotypes, though, persisted until relatively recently in American history. I still vividly remember seeing a Golden Book in the grocery store which i found very odd. Golden Books was a brand of books for children that one would see in drug stores and grocery stores, and many of them were quite good books. We had a natural history from Golden Books which was surprisingly free of religious prejudice, and assumed both an old earth and evolution. But there was a dark side, too. The book which startled me so was
Little Black Sambo. The book was actually written by a Scot who had lived for many years in India, so she was writing about an Indian child. But the story became a symbol of racist bigotry in the United States.
This image is particularly offensive, because it employs the classic "pickaninny" image of racist iconography of the turn of the 19th to the 20th centuries.
The only black people i had ever met were a cattle buyer who was a friend of my grandfather, and my other grandfather's chauffeur, and i was unable to make the connection in my mind between these well-mannered, well-spoken adult men and the Little Black Sambo image.