"Pride and Prejudice" originally known is "First Impression".
Austen could not picked a better name for her novel. Pride and prejudice are the underlying catalysts for what happens throughout the whole novel. Both attributes that hold so much power, make it difficult for characters to overcome them when building relationships.
Originally published under the title "First Impression", Austen picked two completely suitable titles. First impressions in Austen's novel are what characters completely evaluated others on. This set up boundaries for relationships. Instead of furthering their knowledge of people, characters like Elizabeth only touched the surface upon who people truly were. However, as readers get deeper into the novel, they see Elizabeth (and others) let down their guard and also look past their first impressions of others.