He formerly went by the name Wiley Cooper-Jones. On February 19, 2020, Michael learns that his son Jonah is alive. Michael decided to keep calling him Wiley since that's the name he has known for 18 months.
Jonah Corinthos was conceived during his father and biological mother's brief relationship in 2017.
On December 7, after Michael cuts ties with Nelle and suggests she start over, she announces she's pregnant with his child. She claims she took a test the day before and is about six weeks along. However, Michael wants proof.
Later on, Dr. Kim Nero confirms the pregnancy and that she is six weeks along. They run into Carly afterward and Nelle gleefully congratulates the expectant grandma. Both Michael and Carly demand a paternity test and Nelle doesn't look happy and makes it clear she doesn't want money. Nelle eventually agrees to a noninvasive paternity test.
On December 20, Michael and Nelle discuss the baby.
On December 22nd, (Christmas on the show), Nelle is seen talking to the baby after finding out Kelly's is closed.
Later on, Nelle showed up at the Corinthos house and fainted in Michael's arms. She comes to on the couch and explains that she was going to get food but nothing was open so she started driving home and came upon a down tree in the road and got out of the car. She states she didn't mean to end up at the Corinthos', but she started walking and felt faint. Sonny brings Nelle some broth to warm her and the baby up.
Michael asks if she's in any pain and Nelle asks if he's worried about the baby even though he doesn't know if he's the dad yet and Michael says yes. Nelle tells him that they're warming up and they're gonna be just fine. Nelle ends up spending the night at the house.
It was later revealed that Nelle has fainted a lot and it was due to low blood pressure. She was told by a doctor to take it easy.
On January 16, an amniocentesis confirmed that Michael is indeed the father.
On January 22, the baby has appeared in a sonogram, which Nelle would later show Michael after he missed the appointment.
On February 22, Michael and Nelle attend childbirth class.
On March 6, Nelle suffered from Braxton Hicks contractions, while trapped with Carly at Jerome Gallery during an earthquake.
On May 11, Nelle fell down a flight of stairs after getting into an argument with Carly. Nelle accused Carly of pushing her. Thankfully the baby came out unscathed.
On July 13, at what was supposed to be his parents wedding, Nelle had cramps and was rushed to the hospital.
On July 16, his father married his biological mom, though it's later revealed the marriage was invalid.
In 2020, Jason Morgan and Sam McCall becomes Wiley's new godparents after Michael got his son Wiley back in February 2020.
On July 27, Nelle and Michael are involved in a car crash (that Nelle set up in order to kill Michael, although the car was never rigged to crash in the first place) as Michael is setting Nelle up in a sting operation with Detective Chase (in order to take his baby and put Nelle away).
Nelle has no clue that the operation is going on or that Michael is live filming her as they drive before they lose control and the video cuts out. During this Nelle admits she set up Carly (sort of), killed Zachary Grant (her fiancé) and had asked Chase to kill Michael.
Nelle leaves the crash (leaving Michael trapped) as her water breaks in the woods. With the help of Dr. Obrecht, she gives birth to their son.
After the birth of their son, Nelle starts walking, stumbling upon Brad Cooper, whom she passes her son off too, in order to replace his deceased son, Wiley. Nelle also knows that she will lose her baby anyways so she wants Brad and Lucas to raise him. Nelle takes the real baby Wiley and lies to Michael that she "lost the baby".
Brad took the baby home and bonded with him and Lucas. He also meets Lucas' sister, Sam.
On August 2, 2018, Michael and Nelle name their son Jonah. Michael also revealed that he and Nelle were never married.
On August 3, 2018, Michael runs into Brad, Lucas and the baby and he unknowingly holds his own son.
On August 7, Jonah's mom was taken to jail for her numerous crimes against his dad and that side of the family.
On August 17, Jonah spends time with his father and that side of the family unbeknownst to them. Mike also keeps rightfully mistaking Jonah for Michael's son even going so far as to say that he sees Carly in him. Later that day, Brad and Lucas get the news that the birth mother wants the baby back.
On August 21, Brad tells Julian part of the truth of the switch but only that Jonah isn't the birth mother's son, that her son died. He said he came upon a homeless woman who begged him to take her son.
On September 19, Jonah spends time with his biological father and grandma Carly.
On September 20, Jonah is diagnosed with the same heart defect his father and grandfather had when they were babies, he just doesn't need surgery like they did.
On October 15, Jonah and Brad run into his mom Nelle at the courthouse.
On November 6, Jonah is seen at Charlie's pub with Brad, Lucas and his dad Michael.
On December 20, Jonah is seen at the Corinthos compound with his family for his naming ceremony as Wiley Cooper-Jones, with Sam McCall as Godmother and his father, Michael as Godfather.
On December 21, Jonah spends Christmas with his family.
In January 2020, Jonah is reunited with his mother Nelle who recently spent time in prison for 2 years for killing her ex-fiancé Zack plus the attempt murder and marriage fraud of his father Michael. Nelle was hired as “Wiley's” nanny to get close to her son Jonah by Brad.
On February 19, 2020, Michael finally learned that his son is alive when Lucas revealed the truth after he remembered the night of the accident. Carly tore into Brad for switching Wiley with Jonah, and then Michael raged at Brad for what he did.
On February 20, 2020, Jonah is reunited with his father Michael as his mother Nelle tries to flee town with Jonah in her sights but she was too late Michael and Chase were there to come get Jonah and Nelle wouldn’t let go of Jonah and ultimately caves in and gave Michael his son as Chase found Willow unconscious on the floor after being hit by a book to the head and soon afterwards his mother Nelle was arrested and taken into custody and Chase carries a unconscious Willow out of her apartment while Michael share a moment with his son Jonah as they hug and Michael gets emotional and starts tearing up full of happiness and then is reunited with his real family and loved ones.
On March 3, 2020, Michael tells Diane that Jonah’s name will be “Wiley Quartermaine-Corinthos”.
On March 4, 2020, after his mother Nelle is freed of charges from jail, she announced to Michael and Carly that she just filed for sole custody of Wiley, because of the danger Wiley is exposed to due to Michael's family business in the Mob.
On April 9, 2020, it's revealed that his mother Nelle's biological parents are Silas Clay and Nina Reeves making them Wiley's maternal grandparents.
On May 12, 2020, Willow became Wiley's step-mother after Michael and Willow were married. On May 18, 2020, his former adoptive grandfather Julian Jerome became Wiley's step-father after Nelle blackmailed Julian into marry her after learning his secret in order to gain custody of Wiley.
On August 12, 2020, Michael was granted sole custody of Wiley and Nelle was denied any visitation rights.
In September 2020, Michael asked Willow to adopt Wiley and she happily agreed.
In March 4, 2021, Nina visits Wiley after she finds out Nelle was her daughter. Afterwards Willow says that Wiley told her that she wasn’t his mother. Michael tells Nina who admits she mentioned Nelle was Wiley’s mother. Michael says Nina should stay away from Wiley for a while.
On June 11, Nina gets to visit Wiley again after Jax blackmails Michael and she rhetorically asks him if she should tell grandma Carly that grandpa Sonny is alive.
Health and Vitals
Born early [Jul 29, 2018; due in the fall of 2018; shown on Jul 30, 2018]
Kidnapped and held hostage at gunpoint by Shiloh [Sep 23-24, 2019]
Had the flu [revealed Feb 18, 2020]
Almost kidnapped by his mother [Feb 20, 2020]
Taken by his father to the hospital for labored breathing; the hole in his heart had not closed on its own and he received elective surgery; he will need another surgery in six months [Mar 24-Apr 29, 2020; surgery performed on Mar 30, 2020]
Kidnapped from the Quartermaine estate by Julian Jerome under his mother's orders [Aug 20-21, 2020]
Kidnapped by his mother [Aug 24-27, 2020]
Fell and scraped his knee several months ago [revealed Jul 16, 2021]