As for Aunt Jemima et al.
In China there's a brand of toothpaste I was fond of called Darlie.
And their logo is a shiny black man in top hat and tails, seen from the chest up. After a while I thought how odd it was that a black man, with very white smile, was being used to sell a product to Chinese, who generally are pretty racist, but really don't think or care much about black people.
So I surmised that it used to be Darkie toothpaste and they made a tiny change when that became clearly offensive. A few years later the internet picked up and I researched a little, and sure enough it used to be Darkie toothpaste started back in the colonial days, when Shanghai and other major Chinese cities had international settlements. So they merely changed one letter and switched Darkie toothpaste to Darlie. Adn adjusted the bug-eyed racist black guy to a dapper black man logo.
Kind of unbelievable. Even worse the brand has been owned by P&G for decades, and only switched from the Darkie name in 1989.