Final answer:
The character William of Baskerville represents Rationalism in Umberto Eco's The Name of the Rose.
Step-by-step explanation:
In Umberto Eco's The Name of the Rose, the character William of Baskerville represents Rationalism. He is a Franciscan friar and an intellectual who uses logic, reason, and deduction to solve the mysteries in the novel. William's approach to investigating the murders in the monastery is characterized by his reliance on rational thinking and scientific methods.