Posted by JuliaC on Tuesday, September 20, 2011 at 14:06:28 :

SF Call newspaper of 20 Dec 1905, page 14: WEISMANN - In this city, December 19, 1905, Eliza, beloved wife of the late Henry WEISMANN, and mother of Frank, Emil and Dr. Albert K. HAPPERSBERGER and Otto WEISMANN, a native of Germany, aged 67 years.”
Note: Otto used his stepfather's surname.
(I am not related to this family)