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The thing you should do if you can't remember someone's name and you must introduce him to someone else
What is admit your forgetting his name with humor and without making a big deal about it? Just introduce yourself again to the person whose name you forgot, ask him to remind you of his name, then introduce the others to each other. You can also make a very complimentary introduction, i.e. "Abby, I'd like you to meet my friend who played Linus in *You're a Good Man, Charlie Brown.* He was hilarious! This is my friend Abby Jackson. She went to the show with me."