Susan is the Nurse's daughter, now deceased, who was born at the same time as Juliet.
The Cushman sisters, Charlotte and Susan, played Romeo and Juliet in 1846. Charlotte was Romeo and Susan played Juliet.
Susan is Juliet's Nurse's daughter. She died when she was young. She wasn't married.
Susan
The Nurse's daughter that died at birth.
Angelica
The Nurse's daughter Susan died as an infant.
Romeo and Juliet
Romeo and Juliet
juliet
After Romeo and Juliet married Romeo owned Juliet and everything she owed as well.
Romeo was a Montague, Juliet was a Capulet.
Susan. Act 1, Scene 3, Lines 20 and onwards