A day before his father's funeral, William is kidnapped by John Byrne as revenge against Oliver
Oliver Jonas "Ollie" Queen (May 16, 1985 – December 10, 2019; December 10, 2019 – the dawn of time) was a billionaire and former playboy, turned archer superhero of Star City, and the leader of Team Arrow, who later died as savior of the multiverse.
Samantha Clayton (died May 17, 2390) was the ex-lover of Oliver Queen and the mother of William Clayton. Oliver ultimately got her pregnant, though she was paid $1 million by Moira Queen, Oliver's mother, to pretend she had had a miscarriage and move back to Central City, though she never cashed the check.
In "Irreconcilable Differences," the midseason finale of Arrow Season 6, Rene Ramirez revealed that he was the one who confessed to the FBI's Special Agent Amanda Watson that Oliver Queen is, indeed, the Green Arrow. Oliver learned the news during his wedding reception.
It's a secret that Oliver is unable to tell even those closest to him, and it's become the reason that everyone's lives are pretty much as messed up as they are. The dark secret that Oliver finally comes to term to is that he enjoys murder.
However, upon learning that Oliver was also "The Hood", whom she had previously considered a serial killer, Evelyn came to resent Oliver and believed him a false hero. Following this revelation, she betrayed Team Arrow and allied with Adrian Chase/Prometheus, determined to take down Oliver and eventually watch him die.
Soon after being rescued by his father, an explosion occurred on Lian Yu where his mother, who had also been captured, was killed. This resulted in William having to move in with Oliver. However, in early 2019, he moved back to Central City, going to live with his maternal grandparents.
William also refused to talk to Oliver about his problems in school, he eventually forgives Oliver for what happened to him and Samantha, knowing that his father did his best to protect them from the person who is truly responsible for his mother's death.
Felicity, Oliver's wife and one of the show's most important main characters, was absent for the crossover event "Crisis on Infinite Earths" because Felicity's actor Rickards left Arrow after season 7.
Emiko is the paternal half-sister of Oliver Queen/Green Arrow who is the illegitimate daughter of his father Robert Queen and the assassin Shado. Kept secret from the Queen family by her mother, as an infant Emiko was kidnapped by Simon Lacroix/Komodo, Robert's former associate.
Monday's new episode of Arrow, “Star City Slayer,” dropped a bombshell in the show's future timeline to reveal that the bad*ss cage fighter Blackstar is actually Mia Smoak – the daughter of Felicity Smoak and Oliver Queen.
At long last, Prometheus got just what he wanted from Oliver Queen. In "Kapiushon," the latest episode of "Arrow," Adrian Chase tortured Oliver until Oliver finally admitted his deepest, darkest secret: he enjoys killing.
The title refers to Oliver volunteering to serve life in prison at the Slabside Maximum Security Prison for his vigilantism as the Green Arrow as part of a deal he made with the FBI in order to protect the team's identities the moment he outed himself to the public.
In season three, Oliver shortly stopped being himself and adopted the name Al Sah-him serving as a member of the League of Assassins. The supposedly brainwashed Oliver went after Nyssa who had left the League and has been spending time with Team Arrow.