I'm not Linda!

Years ago, there was an old country song that started with the words,
"I'm not Lisa, my name is Julie"

It came to my mind this morning as I was driving home. I think I do not have a memorable name. A lot of people forget it. I can live with that. I have the same problem remembering names and faces sometimes. What is odd to me is that when people forget my name, it seems reasonable to think they'd call my by a variety of other names. That is not the case! So when I was exercising this morning, this was the conversation:

"So, Linda, how are you today?"
"It's Nancy"
"How is your workout going?"

Then as I left, she merrily called out, "Good-bye, Linda!"

When we lived in Alaska, I assumed that people called me Linda because there was a Linda in town with the same last name, so it sounded right to them. There is no Linda around here with my same last name, and yet, if I am mistakenly called the wrong name, it is always Linda. What are the chances of that happening?