Final answer:
Portia is the daughter of Marcus Cato, who died at the battle of Utica; she is a historical figure from the Roman Republic whose family relations are significant in the context of Roman social and political dynamics.
Step-by-step explanation:
Portia is the daughter of Marcus Cato, also known as Cato the Younger, who died at the battle of Utica. Her reference in the context of a historical play suggests that you are likely exploring the dramatic retelling of historical figures within literature. Marcus Cato was a Roman statesman known for his principles and stoicism.
He opposed Julius Caesar and died following the defeat of the Pompeian forces in the African city of Utica during the civil war. Understanding the familial relations and historical backgrounds of characters like Portia provides insight into the social and political dynamics of the Roman Republic during tumultuous periods, as well as their portrayal in literature and drama.