Erminia Frezzolini (27 March 1818 – 5 November 1884) was an Italian operatic soprano. She excelled in the coloratura soprano repertoire, drawing particular acclaim in the bel canto operas of Gaetano Donizetti and Vincenzo Bellini. She was married to tenor Antonio Poggi from 1841-1846.
Erminia Borghi-Mamo (November 18, 1855 – July 29, 1941) was an Italian opera singer. Erminia Borghi-Mamo made her opera stage debut in 1873, in Nice, in "La forza del destino". She was active in Italian opera for the next twenty years.