Final answer:
In 'Romeo and Juliet,' Act 1, Lord Capulet has one daughter, Juliet. This fact is central to the narrative of the play.
Step-by-step explanation:
In Act 1 of "Romeo and Juliet," Lord Capulet only has one child, Juliet. Contrary to the examples provided, which mention various numbers of children in different contexts, Lord Capulet is portrayed in the play as the patriarch of the Capulet family with a single daughter. His concern for her wellbeing and future is a central element of the drama as it unfolds in William Shakespeare's famous tragedy.