Ok, then in the comic Injustice: God's Among Us #13, it is revealed that Harley has a 4 year old daughter named Lucy (this information is correct). Lucy is Joker and Harley's biological child.
Ultimately it was revealed that Duela is the daughter of the The Jokester (Earth-3) and Three-Face (Evelyn Dent) , the Joker's heroic counterpart and archenemy of Owlman (Thomas Wayne, Jr.) This means she is Joker's daughter, just not the mainstream one.
Leaving the newborn baby Lucy with her sister, Harley returned to Gotham only to realize that not only did the Joker not realize she was pregnant, he didn't even care to notice she left at all.
DC Universe. Harleen Quinzel was a psychologist at Arkham Asylum, and after meeting the Joker, she became his frequent accomplice, took on the name Harley Quinn, and got into an abusive codependent relationship with him.
The Joker's most famous romantic partner is definitely Harley Quinn. Together, they were two peas in a pod, at least until it all came crashing down. Harley Quinn got her start with the Joker when she became his psychiatrist at Arkham Asylum.
The comics series The Joker: The Man Who Stopped Laughing features Batman's nemesis get pregnant after a curse is placed on him, Daily Mail reported. Eventually, the Joker "vomits a sort of brown goo" that transforms first into a baby boy and then into a mini version of himself.
In Tom Taylor, Juan Albarran, and Bruno Redondo's Injustice 2 #7 Harley reveals to Black Canary that she had a child, named Lucy, with the Joker years before who is being raised by her sister Delia Quinzel.
Though Zatanna's backward spell, “On eno esle lliw reve evah ruoy ybab!” (“No one else will ever have your baby!”), backfires and the Joker wakes up to discover he is nine months pregnant.
Three Face is the alias of Evelyn "Eve" Dent, a heroic female counterpart to Two-Face in Earth-Three. She's the mother of Duela Dent. Her original affiliation is to The Riddler Family, wich include herself, Quizmaster, Jokester and her daughter Duela (she's The Riddler's/Joker's Daughter).
In comic books the Joker's father looms semi-large in the super-villain's loose backstory, but in Joker—the new origin story in theaters Friday—it's his mother who takes center stage. Penny Fleck (played by Frances Conroy) is a meek, sickly woman who relies on her son, Arthur (Joaquin Phoenix), to take care of her.
Having found legal documents from Arkham which confirm his suspicions, Arthur kills her while in custody of the medical hospital by smothering her with a pillow in revenge for all years of lies and the abuse during his childhood.
Harley Quinn has a daughter named Lucy based on research and the video game Injustice. She finds out she is pregnant and leaves the Joker to live with her sister, After having her daughter Lucy Harley Quinn's sister raises her and she goes back to the Joker and he acts like she never left.
Like most breakups, this one didn't happen overnight. During the “Death of the Family” storyline, Harley grew alarmed at just how much the Joker had changed and how nothing was fun anymore. The final straw for her was when he infected her precious hyenas with rabies in 2012's Suicide Squad #15.
Harley reveals to Black Canary that she has a four-year-old daughter named Lucy who is being raised by her sister. After discovering she was pregnant, Harley left the Joker for almost a year to have their baby instead of abortion.
It is then revealed that the Joker's real name is "Jack Oswald White." Martha then shares that she visited the Flashpoint universe's version of Jack Oswald White, discovering him to be a struggling family man supporting his wife and a child as a janitor at Wayne Casino.
The Joker has had children show up before, but in most cases, they turned out not to be the biological offspring of the villain. Joker's Daughter ended up being the child of Harvey Dent, while his son Anarky was intended to be revealed as someone else's kid before his series was canceled.
Sadly, the future -- 2048 -- is a dystopian one where some mysterious apocalypse has unfolded due to Lex Luthor and the Legion of Doom. To make matters more complicated, Harley and Ivy meet their daughter, Neytiri. While they're happy to meet her, they also quickly learn she's a brat who ends up hating them.
Arthur was brought up by a foster mother and did not have a father figure. The foster mother herself describes him growing up as a fun and kind boy, but later he was abused and beaten by his adoptive parents and even had a severe head injury.
The Joker becomes both verbally and physically abusive. Rather than blame the Joker for this abuse, Harley convinces herself that Batman is to blame because Batman is constantly getting in the way of her being with her “Puddin.” After her failed attempt to kill Batman and some time in Arkham, Harleen returns.
She is the wife of Thomas Wayne and the mother of Bruce Wayne. Joe Chill murders Bruce Wayne, rather than the boy's parents. Martha Wayne was so traumatized by the event she becomes the Joker. Her husband Thomas wished to gain revenge for his son's murder and becomes this reality's version of Batman.
The psychopathology Arthur exhibits is unclear, preventing diagnosis of psychotic disorder or schizophrenia; the unusual combination of symptoms suggests a complex mix of features of certain personality traits, namely psychopathy and narcissism (he meets DSM-5 criteria for narcissistic personality disorder).
Created by Bill Finger and Bob Kane, the character first appeared in Detective Comics #33 (November 1939). Batman: Three Jokers #1 (August 2020). In Batman's origin story, Joe Chill is the mugger who murders young Bruce Wayne's parents, Dr. Thomas Wayne and Martha Wayne.
