2.In Greek mythology, the seer Cassandra was cursed so that none would believe her prophecies. Professor Trelawney's great-grandmother's name was Cassandra.
6.After the Battle of Little Whinging, 13 people gathered at the Burrow to mourn Alastor Moody. Lupin was the first to rise to offer to look for the body.
Remus was later the first of those people to be killed in the Battle of Hogwarts, making Trelawney's prediction — when 13 dine together, the first to rise will be the first to die — come true.
8.Sometime after the Battle of Hogwarts, Harry made sure Snape's portrait was hung in the headmaster's office. It originally did not because Snape abandoned his post.