no she only had 2 sisters Stheno and Euryale and her parents were Phorcy and ceto
Heracles did not "defeat" any of Medusa's brothers and sisters, for they were immortal. Further, the mortal man who killed Medusa with aide of Athena was Perseus - not Heracles.
The two mythical sisters of Medusa were Stheno and Euryale.
Sthenno and Euryale were sisters of Medusa.
Medusa's sisters were immortal and could not die.
medusa and her gorgon sisters were nymphs posiedon was "dating" medusa athena caught them in her temple and turned medusa and her sisters into gorgons
Stheno and Euryale were the immortal Gorgons and sisters to Medusa.
Medusa had no brothers but had 2 sisters named Sentheno and Euryale
I think it was part of the punishment. Athena turned Medusa ugly because she was angry at her, and she also turned Medusa's sisters ugly.
Medusa was called Medusa... She had two sisters; Euryale and Stheno. They were the three Gorgons. Euryale and Stheno were immortal. Medusa was not.
nobody knows exactly. all we know is that she had two sisters.
Most likely, since Medusa and her sisters, the Gorgons, turned any one who came there way into stone.