No. Atticus also had a brother, Jack. Alexandra and Jack are the only two siblings mentioned.
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Scout learns that the man she met at the jail was Tom Robinson, who is accused of raping Mayella Ewell. Additionally, she discovers that her father, Atticus, is defending Tom in court. This news leads to Scout and Jem facing challenges and prejudices in their community.
Aunt Alexandra (Atticus's sister) had come to Maycomb for two reasons. She said she had come to help raise the children who needed a "feminine" influence in their life. But really, she came to Maycomb because she was worried about what would happen to the children while their father was defending Tom Robinson.
She thinks that Scout is not growing up how she expects a young lady to grow. As Scout lost her mother her only female company is their cook Calpurnia, but Scout tends to look up to her older brother Jem and follow in his footsteps, thus making her seem like a tomboy. Aunt Alexandra thinks that it is wrong of Atticus to bring Scout up in such a way therefore she stays with the family to teach Scout how to become a young lady. She also thinks that Atticus gives his children too much freedom, for example, when Scout asks her father if she could visit Calpurnia's home, Aunt Alexandra sees this as wrong and won't allow it due to the prejudice towards those people at that period of time. If Aunt Alexandra hadn't of been there Scout would of been allowed to visit. In conclusion it seems that Aunt Alexandra wants Jem and Scout to fit in with the society of that time, where as Atticus disagrees and thinks that everyone should be who they want to be and not be prejudiced against.
Atticus Finch and Aunt Alexandra differ in opinion over the Cunninghams in Harper Lee's "To Kill a Mockingbird." Atticus believes in treating everyone with respect and understanding, regardless of their social status or background. He sees the Cunninghams as good people who are struggling financially. Aunt Alexandra, on the other hand, values social status and believes the Cunninghams are beneath the Finch family due to their lower socioeconomic status.
Scout used to think that Aunt Alexandra was a snob who only cared about the family name, but as the story continues, Scout grows to appreciate Aunt Alexandra. After, hearing how much Aunt Alexandra actually loves and cares fro Atticus, and how she was actually defending him, Scout begins to think that Aunty may not be as bad as she though!
Atticus says that Calpurnia is a necessary person and part of the family. She has been part of the family for a long time and is will leave only if she wants to. Atticus basically tells Aunt Alexandra that Calpurnia is staying.
Aunt Alexandria was waiting for the children when they came home from the church service and she came to turn Scout into a proper lady because it was only a matter of time before she had begun to like clothes and boys.
Uncle Jack is one of Atticus' siblings and the other is Aunt Alexandra. Uncle Jack's only appearance in the book is when the Finches are at Finch's Landing. Uncle Jack works in the Medical sector as a doctor and is not considered a protagonist.
Aunt Alexandra is a very prejudice woman. She does not tolerate Calpurnia being the only motherly figure for scout. She shows Calpurnia little respect because she believes Cal is of "lower class". She also judges others because of their family name. Atticus even jokes with her asking if she would judge their family too. By knowing your name she instinctively "knows" how you are suppose to act.
Atticus's children are Jem and Scout Finch.
Some dynamic characters in "To Kill a Mockingbird" include Scout Finch, who matures and gains a deeper understanding of the world around her, and Atticus Finch, who remains unwavering in his moral beliefs despite the challenges he faces. Another dynamic character is Boo Radley, whose mysterious nature evolves as the story progresses.
"Insubordination" by blacks because it "will only encourage them," which, by the way, is ridiculous. They all know what's happening anyway.