They would be great nieces or great nephews.
What family members your is fathers mothers daughters sons sisters
Medusa and her two sisters were daughters of Phorcys and Ceto.
She had seven Daughters one of them died and another was immature. Two of the daughters are Joseph Ashburn's and the other five are John Claypoole's. most of her children died.
She is your niece.
She is your niece.
All of the daughters of Zeus are half sisters of Athena.
miss/misses sister/sisters gal/gals child/children daughter/daughters princess/princesses
Grand-Nephew
4 daughters, 3 sons.
The sisters are not named per se. Scripture only says Adam and Eve had sons and daughters, not stating the daughters by name.
Some exact nouns for two children are sisters, brothers, brother and sister, cousins, sons, daughters, son and daughter, grandchildren, grandsons, granddaughters, etc.