The adoption of the mother of Jesus as a virtual goddess may represent a reintroduction of aspects of the worship of Isis. "When looking at images of the Egyptian goddess Isis and those of the Virgin Mary, one may initially observe iconographic similarities. These parallels have led many scholars to suggest that there is a distinct iconographic relationship between Isis and Mary. In fact, some scholars have gone even further, and have suggested, on the basis of this relationship, a direct link between the cult of Mary and that of Isis." 

Which Egyptian goddess do some scholars ascribe similarities to?