re: What do you do when people call you by the wrong name?

My former boss, who is still with the company but is now in a different role, used to constantly mispronounce my last name. I corrected him every time and got more and more aggressive about it. At some point it shows a total lack of respect for someone when you can't remember how to pronounce their name. Needless to say I don't think very highly of him.