People always refer to Cleveland Brown's wife as "Dona Tubbs" I was always curious about why her last name is Tubbs when she's a married woman. Apparently her last name is hyphenated and her full name is "Dona Lue Retten Tubbs-Brown," but in finding this out I also noticed her ex husband Robert's last name is Tubbs as well. This is strange because Tubbs is supposed to be her maiden name, it's also the same last name of her mother. If Dona's family name is "Tubbs" does that mean Robert is her cousin? Do you guys think this is a coincidence, on purpose, or just poor planning when mapping out the characters? I personally think they weren't paying attention and made a mistake, what do you guys think?