I Called Hiring Manager the Wrong Name

Dear Experts, I was on an interview last Friday and spent an hour talking to the hiring manager. I thought the meeting when great, UNTIL I got home and was writing my thank-you notes. I realized that I had been calling the hiring manager 'Rob' the whole time and he goes by 'Bob.' What should I do? He never corrected me in the interview, but I must have said his name at least 5 times. Should I call and apologize? Do I mention it in the thank you note? I'm so embarrassed and would at least like to let him know that it wasn't intentional. At the same time, I feel like this must make me look like an idiot. Why do you think he didn't correct me? What should I do? Here is how our CAREEREALISM-Approved Experts answered this question on Twitter:Q#460 Address correctly, apologize for using wrong name, thank him for excusing your "oops." (@juliaerickson) Q#460 I'd apologize in your e-mail. That way he at least knows you picked up on it. It happens to us all. (@jtodonnell) Q#460 I would add a brief sentence noting his graciousness in not correcting his name - I am sure he noticed! (@MarySevinksy) Q#460 Address the thank to the correct name. Rob and Bob are often interchanged. Luckily you didn't call him Fred! (@tmonhollon) Q#460 Don't mention it again. If they didn't correct you immediately, they probably won't hold it against you. (@gradversity) Our Twitter Advice Project (T.A.P.) is no longer an active campaign. To find an answer to the above question, please use the "Search" box in the right-hand column of this website.