Rognoni is an Italian surname.
In particular, it can refer to a family of musicians, who also spelled it Rognino, Rogniono, Rognone, Rongione, or Rongioni. They were also called "Taeggio" (or "Taegio") after the presumed place of birth of Riccardo.
Others with the surname
References
Rognoni Wikipedia(Text) CC BY-SA