Her full name is Eilleen Regina Twain.
On why she changed her name, she explained, “It’s actually a long story. In short, I was born Eilleen Regina Edwards, and then I was adopted and I became Eilleen Regina Twain. Then I became a professional singer and I needed a stage name that sounded a little less like my grandmother’s name, because I’m named after my grandmother, both my grandmothers, Eilleen and Regina.
“I think, in my mind, I was just not really wanting to be called my grandmother’s name onstage, so I decided to change it to Shania Twain,” she added. “I met somebody with the name Shania, thought it was beautiful, and Shania Twain was born.”