Elizabeth Cassandra
(she typically went by Cassandra)
Jane Austen had six sisters: Cassandra, Francis, Elizabeth, Cassandra, Harriet, and Charles.
Cassandra Elizabeth Austen was Jane Austen's only sister. Cassandra was two years older than Jane. They were very close to each other, and neither ever married.
Cassandra
Jane Austen's real name is Jane Austen. There is no real evidence that I know of that says Jane has a middle name.
Jane Austen doesn't have a middle name.
jane austen
Vanne
Yes, Jane Austen is a proper noun because it is the specific name of a person.
This might be "Pride & Prejudice", about 5 sisters (http://www.imdb.com/title/tt0414387/), based on the novel of the same name by Jane Austen.
Jane Austen's mother, whose maiden name was Cassandra Leigh, was born on September 26, 1739.
Charles Bingley's sisters in Pride and Prejudice are named Caroline Bingley and Louisa Hurst. Caroline is portrayed as being haughty and conniving, while Louisa is depicted as more reserved and passive.
"Pride and Prejudice" was originally published under the pseudonym "A Lady", which was Jane Austen's pen name.
Jane Austen was called Jenny by her family as a nickname for the name Jane, which commonly had the nickname Jenny during that time period. It was a common pet name for girls named Jane in the late 18th and early 19th centuries.
Jane Austen's first two books to be published, Sense and Sensibility and Pride and Prejudice, were published by Thomas Egerton. The rest of her books were published by John Murray, who was a better known publisher.
All of the books by Jane Austen published during her lifetime were anonymous. Two, Persuasion and Northanger Abbey, were not published until after she died, and they were under her own name. They came out together.