Stella's perfect name

Stella: Was Grandma or Grandpa originally named Walter?
Me: Grandpa was, Grandma was Schmerbach and changed it to Walter when she got married.
Stella: Ok
Me: Like I changed my name to Walter when I got married.
Stella: Ooooh, ok.  Well, I'll never have to do that.
Me: Why? (expecting a "I'm keeping my name" or "I'm never getting married)
Stella: Because I'm already named Walter