FORTUNE — Kraft CEO Irene Rosenfeld recently announced that the company was splitting off an international unit, which will be named Mondelez, a portmanteau of “delicious world.” This got us thinking of other notable renamings, either in the wake of a scandal or merger, or — like Kraft (KFT) — to reach a new market. How successful were they? We asked real-life Mad Man Donny Deutsch to weigh in.

This story is from the April 30, 2012 issue of Fortune.