Cassandra Trelawney

Cassandra Trelawney was a famous, celebrated witch and Seer. She was the great-great-grandmother to Hogwarts School of Witchcraft and Wizardry Divination Professor Sybill Trelawney. She possessed the Inner Eye, which was passed on into generations later.

Family members

 * Sybill Trelawney (great-great-granddaughter)
 * Trelawney family (extended relatives)

Magical abilities and skills
Divination: Little is known about Trelawney's life. It is known that she was a "genuine Seer" and that "Cassandra's gift has been much diluted over ensuing generations, although [Sybill] has inherited more than she knows," implying that Cassandra was a very powerful Seer. She has been referred to as "Legendary" on more than one occasion. Indeed, when Albus Dumbledore was preparing the scrap the Hogwarts Divination program, Sybill Trelawney's hertiage was enough to get her a job interview for the post.

Etymology
Cassandra is generally taken to mean "she who entangles men". This meaning came from the Greek culture and was translated to mean various other things as well, such as "oracle".

In Greek mythology, Cassandra was a princess of Troy. Her beauty caused Apollo to grant her the gift of prophecy. However, when she did not return his love, Apollo placed a curse on her so that no one would ever believe her predictions.