People spell an easy name incorrectly
So let's say my name is Jane Doe. People will spell "Jane" as Jaine or Jeighn or Jan. That's not Jane. Doe, or in my case more like Doe-schewich, they ask anyway. It's not like my name is Javanah or Jannalica where there would be a mix up. It's plain Jane. And I come across as a plain Jane too!