[Opinions] Re: Best nickname stories?
My husband's grandmother is called Sally, but her name is actually Rachel. All I know is that her husband called her Sally back in the day, I'd presume as a joke, but I don't think any of us know if there's a specific reason why.
My husband also has an aunt who is often called Dio. Apparently one of his cousins couldn't say her name, Janet, when she was little, and it sounded like Dio. So it stuck to differentiate her from another aunt by the same name.