Question: What is the name of the main antagonist, son of Lady Capulet's brother and who was slain in a duel by Romeo Montague?

Context paragraphs:
Juliet: Juliet Capulet (Italian: "Giulietta Capuleti" ) is the female protagonist in William Shakespeare's romantic tragedy "Romeo and Juliet".  Juliet is the only daughter of the patriarch of the House of Capulet and falls in love with Romeo, a member of the House of Montague (with which the Capulets have a blood feud).  The story has a long history that precedes Shakespeare himself.

Tybalt: Tybalt is the main antagonist in William Shakespeare's play "Romeo and Juliet".  He is the son of Lady Capulet's brother, Juliet's short-tempered first cousin, and Romeo's rival.  Tybalt shares the same name as the character Tibert/Tybalt the "Prince of Cats" in "Reynard the Fox", a point of mockery in the play.  Mercutio repeatedly calls Tybalt "Prince of Cats" (perhaps referring not only to Reynard but to the Italian word cazzo as well).  Luigi da Porto adapted the story as "Giulietta e Romeo" and included it in his "Historia novellamente ritrovata di due Nobili Amanti" published in 1530.  Da Porto drew on "Pyramus and Thisbe" and Giovanni Boccaccio's "Decameron".  He gave it much of its modern form, including the lovers' names, the rival families of Montecchi and Capuleti, and the location in Verona.  He also introduces characters corresponding to Shakespeare's Mercutio, Tybalt, and Paris.  Da Porto presents his tale as historically true and claims it took place in the days of Bartolomeo II della Scala (a century earlier than Salernitano).  Montague and Capulet were actual 13th-century political factions, but the only connection between them is a mention in Dante's" Purgatorio" as an example of civil dissension.

Barbara Kinghorn: Barbara Kinghorn (born 21 November 1944) is a British actress who was a member of the Royal Shakespeare company from 1980 - 1983 playing Lady Capulet in Romeo and Juliet and Helen of Troy in Troilus and Cressida.  She also played Timmin in the "Doctor Who" episode "The Caves of Androzani".  She appeared in "Sorry! " and "Chance in a Million".  Her West End appearances included "Fringe Benefits" at the Whitehall Theatre and "Good" at the Aldwych.

Romeo + Juliet: William Shakespeare's Romeo + Juliet (shortened to Romeo + Juliet) is a 1996 American romantic drama film directed, co-produced, and co-written by Baz Luhrmann, co-produced by Gabriella Martinelli, and co-written by Craig Pearce, being an adaptation and modernization of William Shakespeare's tragedy "Romeo and Juliet".  The film stars Leonardo DiCaprio and Claire Danes in the leading roles of Romeo and Juliet, who instantly fall in love when Romeo crashes a party and meets her, despite their being members of the Montague and Capulet family; Brian Dennehy, John Leguizamo, Pete Postlethwaite, Paul Sorvino, and Diane Venora star in supporting roles.

Benvolio: Benvolio is a fictional character in Shakespeare's drama "Romeo and Juliet".  He is Montague's nephew and Romeo's cousin.  Benvolio serves as an unsuccessful peacemaker in the play, attempting to prevent violence between the Capulet and Montague families.

Claudia Gabel: Claudia Gabel (born February 20, 1975) is the author of several young adult novels published by Scholastic Inc and HarperCollins.  The "In or Out" series consists of four novels--"In or Out" (2007), "Loves Me Loves Me Not" (2007), "Sweet & Vicious" (2008), and "Friends Close, Enemies Closer" (2008).  The books are set in Poughkeepsie, New York and follow best friends Nola James and Marnie Fitzpatrick through their first two months of high school.  "Romeo and Juliet and Vampires" (2010) is a mash-up novelization of William Shakespeare's famous play, featuring a new version of the love story between Juliet Capulet, the daughter of two notorious vampires, and Romeo Montague, who was born into a family of vampire slayers.

Mercutio: Mercutio ( ) is a fictional character in William Shakespeare's 1597 tragedy, "Romeo and Juliet".  He is a close friend to Romeo and a blood relative to Prince Escalus and Count Paris.  As such, being neither a Montague nor a Capulet, Mercutio is one of the few in Verona with the ability to mingle around those of both houses.  The invitation to Capulet's party states that he has a brother named Valentine.

Romeo: Romeo Montague (Italian: "Romeo Montecchi" ) is the protagonist of William Shakespeare's tragedy "Romeo and Juliet".  The son of Montague and his wife, he secretly loves and marries Juliet, a member of the rival House of Capulet.  Forced into exile after slaying Juliet's cousin, Tybalt, in a duel, Romeo commits suicide upon hearing falsely of Juliet's death.

Characters in Romeo and Juliet: Prince Escalus, the Prince of Verona, is the desperate resolver of the feuding families.  He is based on the actual Scaligeri family which ruled Verona, possibly on Bartolomeo I.  Escalus is the voice of authority in Verona.  He appears only three times within the text and only to administer justice following major events in the feud between the Capulet and Montague families.  He first punishes Capulet and Montague for the quarrel between Tybalt, Benvolio, and a handful of servants.  He returns too late to stop the fatal brawls between Tybalt and Mercutio and, subsequently, Tybalt and Romeo.  Escalus is prepared to execute Romeo for his offence—Romeo's killing Tybalt—but lightens the sentence to lifetime banishment from Verona, when Benvolio insists that Tybalt started the quarrel by murdering Mercutio, a kinsman to the Prince.  He yells at Lord Montague for engaging in the feud, which really is the root cause which led to Tybalt killing Mercutio.  So, according to him, he lost his dear kinsman because of Lord Montague, so by exiling Romeo, Escalus gives him a 'taste of Montague's own medicine', to see how Montague feels when he loses a loved one.  Prince Escalus returns in the final scene—V.iii—following the double suicide of Romeo and Juliet, and at last declares the Lords Montague and Capulet guilty of Romeo and Juliet's death, and angrily tells them that their totally useless feud resulted in the deaths of not only their own loved ones (Lady Montague, Romeo, Juliet, and Tybalt), but also in the deaths of Escalus' loved ones (Mercutio and Paris).  He curses the feud that kills Romeo and Juliet whom he really feels sad for, just before the Lords come to peace with each other.  In the end, Prince Escalus becomes very happy that the feud has finally ended, even if with a heavy price, since it ended late.

Thea Tolentino: Thea Louise Señerez Tolentino (born 13, August 1996 in Calamba, Laguna, Philippines), better known for her screen name.  Thea Tolentino, is a Filipina actress known for her role as Ashley Mercado Alcantara in the GMA Network television drama "The Half Sisters", Tolentino started her career as one of the winners of the of the reality show, "Protégé", a reality based "artista" search, created by GMA Network.  Since then, she became a contract artist of GMA and began appearing on their television dramas such as "Teen Gen", "Anna Karenina," and "", Previously years 2016, she joined the cast in "Hahamakin ang Lahat" played the role as Phoebe-Ke, the main antagonist of the cast, In 2017, she joined the cast as the main antagonist Trish to Sinag (Mendoza) and Benjie's mistress (Richards).  Began 2017, Tolentino joined the cast in "Haplos" as Lucille, the main antagonist of the series.  She will also star in an upcoming movie entitled "This Time I'll be Sweeter" as the main antagonist that headlines Ken Chan and Barbie Forteza, her co-star in the critically acclaimed series "The Half Sisters".

Supporting paragraphs: Romeo Tybalt
Answer: Tybalt