Maybe Y represents the convergence of timelines, like the John Titor patch, similar symbol is used on every space agency insignia called the "vector", also resembles a snakes tongue.
Maybe the top controllers [Y] don't exist in this time so we've never heard of them but they come to visit and change the timeline in their favor.
had crossed my mind. but why called Y?
To Kill a Mockingbird, novel by Harper Lee, published in 1960. Enormously popular, it was translated into some 40 languages and sold more than 30 million copies worldwide. In 1961 it won a Pulitzer Prize. The novel was praised for its sensitive treatment of a child’s awakening to racism and prejudice in the American South.
To Kill a Mockingbird
This book cover is one of many given to Harper Lee's classic work To Kill a Mockingbird (1960). The novel won a Pulitzer Prize in 1961 and the next year was made into an Academy Award-winning film.
Grand Central Publishing/Hachette Book Group
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Summary
To Kill a Mockingbird takes place in the fictional town of Maycomb, Alabama, during the Great Depression. The protagonist is Jean Louise (“Scout”) Finch, an intelligent though unconventional girl who ages from six to nine years old during the course of the novel. She is raised with her brother, Jeremy Atticus (“Jem”), by their widowed father, Atticus Finch. He is a prominent lawyer who encourages his children to be empathetic and just. He notably tells them that it is “a sin to kill a mockingbird,” alluding to the fact that the birds are innocent and harmless.
When Tom Robinson, one of the town’s black residents, is falsely accused of raping Mayella Ewell, a white woman, Atticus agrees to defend him despite threats from the community. At one point he faces a mob intent on lynching his client but refuses to abandon him. Scout unwittingly diffuses the situation. Although Atticus presents a defense that gives a more plausible interpretation of the evidence—that Mayella was attacked by her father, Bob Ewell—Tom is convicted, and he is later killed while trying to escape custody. A character compares his death to “the senseless slaughter of songbirds.”
The children, meanwhile, play out their own miniaturized drama of prejudice and superstition as they become interested in Arthur (“Boo”) Radley, a reclusive neighbour who is a local legend. They have their own ideas about him and cannot resist the allure of trespassing on the Radley property. Their speculations thrive on the dehumanization perpetuated by their elders. Atticus, however, reprimands them and tries to encourage a more sensitive attitude. Boo makes his presence felt indirectly through a series of benevolent acts, finally intervening when Bob Ewell attacks Jem and Scout. Boo kills Ewell, but Heck Tate, the sheriff, believes it is better to say that Ewell’s death occurred when he fell on his own knife, sparing the shy Boo from unwanted attention. Scout agrees, noting that to do otherwise would be “sort of like shootin’ a mockingbird.”
To Kill a Mockingbird is both a young girl’s coming-of-age story and a darker drama about the roots and consequences of racism and prejudice, probing how good and evil can coexist within a single community or individual. Scout’s moral education is twofold: to resist abusing others with unfounded negativity but also to persevere when these values are inevitably, and sometimes violently, subverted. Lee reportedly based the character of Atticus Finch on her father, Amasa Coleman Lee, a compassionate and dedicated lawyer. The plot of To Kill a Mockingbird was inspired in part by his unsuccessful youthful defense of two African American men convicted of murder. Criticism of the novel’s tendency to sermonize has been matched by praise of its insight and stylistic effectiveness.
Harper Lee
Harper Lee
Harper Lee, 2001.
Terrence Antonio James—Tribune Content Agency LLC/Alamy
One character from the novel, Charles Baker (“Dill”) Harris, is based on Truman Capote, Lee’s childhood friend and next-door neighbour in Monroeville, Alabama. After the phenomenal success that followed the publication of To Kill a Mockingbird, some suspected that Capote was the actual author of Lee’s work, a rumour put to rest when, in 2006, a 1959 letter from Capote to his aunt was found, stating that he had read and liked the draft of To Kill a Mockingbird that Lee had shown him but making no mention of any role in writing it.
The novel inspired numerous adaptations, the most notable of which was the classic 1962 film starring Gregory Peck as Atticus. His Academy Award-winning performance became an enduring part of cinema history. Other adaptations included a Broadway play that was adapted by Aaron Sorkin and debuted in 2018.
https://www.britannica.com/topic/To-Kill-a-Mockingbird