The OP asked a question from a position of ignorance, acknowledged it and grasps why the company is changing the name and logo. Some other people on the thread, however, clearly knowing equally little about slave 'titles' etc, came in screaming about 'PC gone mad' and 'how can rice be racist?' Why not just look something up if you don't understand it? Even the media coverage of the logo change gives the basics.
I haven't seen if someone else said it, but 'Uncle So and So' is also a typical name for what was called a 'house slave' -- a compliant slave who had higher status because of indoor work than a field or plantation slave, and was perceived to be closer to his 'owners' and loyal to them, rather than rebellious. A version of it is still used as a pejorative term for right-wing black people who support existing power structures. Malcolm X used the term.
en.wikipedia.org/wiki/House_negro