In trying to trace my grandfather's immigration I have discovered that my grandmother (his wife) bears the same surname as her mother. She was born in 1911, but I can't find her birth record at the moment. She was Gertrud Schollhorn. I got the information from her death notice.
The death notice was the reporting of her estate. Filed at NAAIRS (I was there on Monday) it listed her mother Cresenzia Schöllhorn and father John Dill from San Francisco. I couldn't get a copy as it was a bound file. Photo indistinct. The estate was reported by my grandfather.
Is it safe to presume she was born out of wedlock? What was the protocol in 1911?