His sisters name was Georgina Darcy
No he is not an only child he has a younger sister, Georgiana Darcy.
The name of Fitzwilliam Darcy's estate is Pemberley.
Fitzwilliam Darcy's sister is named Georgiana Darcy. She is known for being shy and reserved, and plays a significant role in Jane Austen's novel "Pride and Prejudice."
Lady Catherine is Fitzwilliam Darcy's aunt
Colonel Fitzwilliam provides Elizabeth with several important pieces of information that confuse her understanding of Mr. Darcy. Before meeting with Colonel Fitzwilliam, Elizabeth held the prejudice that Mr. Darcy had no concern for others. Colonel Fitzwilliam speaks highly of Mr. Darcy and commends his dedication to his sister. Elizabeth begins to reconsider her feelings of Mr. Darcy after her friendly chats with Colonel Fitzwilliam. However, eventually Colonel Fitzwilliam casually mentions that Mr. Darcy recently helped save a friend from a relationship he should not enter. Eizabeth immediately realizes that Mr. Darcy interfered with Jane and Mr. Bingley's relationship. Elizabeth becomes incredibly offended by Mr. Darcy's actions and no longer wants to have any interaction with him after learning this information from Colonel Fitzwilliam.
They are cousins.
Col. Fitzwilliam reveals to Elizabeth the fact that Darcy had acted to separate Bingley from Jane. Col. Fitzwilliam also is used by Darcy as a reference to back up his claims about Wickham.
Col. Fitzwilliam
Fitzwilliam reminds Elizabeth of Mr. Darcy due to their shared reserved and contemplative nature, as well as their similar upbringing in the upper class of society. Elizabeth notices these similarities when conversing with Fitzwilliam at Rosings Park.
Heather Lynn Rigaud has written: 'Fitzwilliam Darcy, rock star' -- subject(s): Fitzwilliam Darcy (Fictitious character), Rock musicians, Fiction
Elizabeth Bennet Fitzwilliam Darcy These are the two main characters The next two would be; Mr Charles Bingley - friend of Darcy Jane Bennet - Elizabeth's elder sister
Darcy's friend who tells Elizabeth that Darcy has separated Bingley from Jane is Mr. Bingley's sister, Caroline. She reveals this information to Elizabeth out of jealousy towards Jane and to further her own interests in marrying Darcy herself.