I will only be highlighting 2 other Hitlers .Alois Hitler Sr ,Father of Adolf and Heinrich (Heinz) Hitler ,nephew of Adolf.
The name Hitler should actually never have existed. Alois Hitler, Sr. (bornAlois Schicklgruber; 7 June 1837 – 3 January 1903)
Born 7 June 1837, Alois Schicklgruber was the son of a 42-year-old unmarried farmhand by the name of Maria Anna Schicklgruber. The identity of his father remains uncertain: on Alois’s birth certificate the space for the father’s name was left blank and the word illegitimate was scrolled across the certificate.