To your sister's daughter you are an aunt (or uncle) and she is your niece. To your niece's daughter ( your sister's granddaughter) you are a great-aunt (or great-uncle) and she is your grand-niece.
They were both daughters of Zeus, and so sisters.
She is your niece, you are her aunt or uncle.
What family members your is fathers mothers daughters sons sisters
Medusa and her two sisters were daughters of Phorcys and Ceto.
She is your niece.
She is your niece.
All of the daughters of Zeus are half sisters of Athena.
So far as I know, he has good relations with all of his family- his wife, daughters,parents and brothers and sisters.
Grand-Nephew
The sisters are not named per se. Scripture only says Adam and Eve had sons and daughters, not stating the daughters by name.
4 daughters, 3 sons.
Two sisters, daughters and half-sisters of Oedipus and his mother Jocasta.