My mom got a similar call a number of years ago and they knew my nephew's name, but they still couldn't pass the smell test.
Got the whole story from my sister. Even better than I remembered.
Caller: Hi, Grandma it’s your favorite grandson.
Mom: Ian, you sound different.
Caller: Grandma, I’m in trouble. I need money for a lawyer.
Mom: But Ian, you ARE a lawyer.
I've gotten the "Hi I'm from Microsoft and we've noticed problems with your computer." call. Had a little fun with the bozos.