What is the name of Atticus Finch's sister who visits his family?

Atticus Finch’s sister who visits his family is Aunt Alexandra. Alexandra Hancock is Atticus’s older sister and the aunt of Scout and Jem Finch in Harper Lee’s novel.

Aunt Alexandra arrives at the Finch household to help raise the children and to provide what she considers a proper feminine and family-centered influence. She is strongly concerned with the Finch family’s ancestry, reputation, and social position in Maycomb. She repeatedly urges Scout to behave like a traditional Southern girl and to identify with the Finch family’s heritage.

Her presence creates conflict because Scout values independence and dislikes being told how a “lady” should act. Alexandra also disapproves of Atticus’s defense of Tom Robinson, at least initially, because the case threatens the family’s standing in the community. Despite her rigid opinions, she is not simply heartless: after the trial, she shows genuine concern for Atticus and the children.

A common mix-up is confusing Aunt Alexandra with Calpurnia, the Finch household’s longtime housekeeper, or Miss Maudie, the family’s neighbor and friend. Neither is Atticus’s sister.