Displayed in this family tree are only members of the Grey family and their offspring. Characters from alternate universes are only included when they crossed over to the mainstream Marvel Universe.
Jean Grey’s parents, John and Elaine, were introduced in X-Men (1st series) #5, when they visited their daughter at Xavier’s school. Jean first mentioned to have a sister in X-Men (1st series) #22, but it wasn’t before X-Men (1st series) #136, that Sara Grey made an on-panel appearance.
During a spaceflight, Jean was exposed to dangerous cosmic radiation, apparently pushing her powers to the max and causing her transformation into Phoenix. [X-Men (1st series) #100-101] Unfortunately, Phoenix could not handle her incredible powers and was corrupted by them, causing her to commit suicide on the moon in order to save the people she loved ones from herself. [X-Men (1st series) #137]
Several months afterwards, Scott Summers met a woman named Madelyne Pryor, who looked exactly like Jean. The uncanny resemblance was no coincidence, for she was actually a clone of Jean Grey, created by Mr. Sinister. Having studied the genetic make-ups of both Scott and Jean, the scientist believed that a child with their combined genes would be the ultimate weapon against his former master, Apocalypse.
As such, Sinister programmed Madelyne to fall in love with Scott and bear his child, although she was completely unaware of it. Only a few weeks after they first met, they were married, and soon thereafter Madelyne was announced to be pregnant. Nine months later, she gave birth at Xavier’s mansion. [X-Men (1st series) #175, 200] The boy was named Nathan Christopher Charles Summers. Whereas “Christopher“ and “Charles“ refer to Scott‘s biological father and his mentor, Professor Xavier, “Nathan“ was an obvious hint to Nathaniel Essex, aka Mr. Sinister, who seems to have placed the name as a post-hypnotic suggestion within Maddie’s mind.
Around the same time, Jean was discovered alive. It turned out that, way back during the shuttleflight, when she was dying of radiation poisoning, she was approach by a cosmic entity, the Phoenix Force. Wanting to experience humanity, it duplicated Jean’s body and filled it with some of her soul and life-force. It was the Phoenix Force who had ended its mortal shell’s existence on the moon, whereas the real Jean was resting in a healing cocoon at the bottom of Jamaica Bay all the time. [Fantastic Four (1st series) #286]
As soon as he heard of Jean’s miraculous return, Scott abandoned his wife and his child to be with his first love again. Eventually, after being influenced by demon magic, Madelyne manifested powers on her own, and the two women confronted each other during Inferno. The battle ended in a stalemate, at which point Maddie committed suicide and tried (without success) to drag Jean along. During the incident, Madelyne’s true origin and connection to Mr. Sinister was finally revealed. [X-Factor (1st series) #38]
Shortly after her return, Jean tried contact her sister, only to find that Sara and her kids, Gaylin and Joey, had gone missing. [X-Factor (1st series) #12] At this point, Sara’s husband, Paul, was apparently no longer living with them, so he must have either died or had divorced them, possibly because he could not deal with the possibility of his children growing up to be mutants too. Paul was only seen once, during Phoenix’s funeral in X-Men (1st series) #138; his name was revealed in Bizarre Adventures #27.
Over a year after her disappearance, Sara was revealed to have been absorbed by the Phalanx. [X-Men (2nd series) #36] Gaylin and Joey, on the other hand, had been kidnapped and brainwashed by Nanny. After they had been found and rescued by X-Factor, they went to live with their grandparents. [X-Factor (1st series) #35, 40] The last name, Bailey, stems from X-Man #30, where it was used by Prime Sentinels hunting the children. As Bastion‘s troops had downloaded Xavier‘s files shortly before, the children’s full names seem to have been among the entries.
Madelyne was not the only redhead resembling Jean Grey that the X-Men met during the time she was believed dead, as there was also the young woman named Rachel Summers. First seen in X-Men (1st series) #141, she is the Jean’s daughter from a dark future timeline called “Days of Future Past,“ and ended up in the main Marvel Universe after traveling through the timestream. [New Mutants (1st series) #18] Rachel herself considers Scott Summers her father, yet there have also been clues pointing in a different direction, like her being sired by Wolverine, or the idea that she no biological father at all, her being the offspring of Jean Grey and the Phoenix Force.
While most of the X-Men knew of Rachel’s heritage, it took her quite a while to reveal herself to Scott and Jean as their alternate future daughter. [X-Factor Annual #5] When Scott and Jean finally got married in X-Men (2nd series) #30, it was the happiest day for Rachel, as this union meant there was a chance she could be born in this timeline too. However, much later, she was devastated when she learned of Cyclops‘ psychic affair with Emma Frost, and angrily denounced the name Summers, referring to herself as Rachel “Grey“ instead. [Uncanny X-Men #444]
In her own timeline, Rachel was romantically involved with Franklin Richards, the son of Mr. Fantastic and the Invisible Woman, until he was killed in a Sentinel attack. However, in a so far unnamed alternate reality, Franklin survived and married Rachel. They had a child, Jonathan Reed Richards, who would grow up to become Hyperstorm. He time-traveled to bother the world‘s premiere superhero team in Fantastic Four (1st series) #406-409; his heritage was revealed in Fantastic Four (1st series) #414.
At some point, baby Nathan Christopher was infected with a techno-organic virus, and Cyclops had no other option but to hand his son over to Askani, a woman claiming to be from some far-fetched future, where they had the proper means to cure him. [X-Factor (1st series) #68] In fact, she belonged to an entire sisterhood called Askani, earning the boy the name Askani’Son. However, the boy’s infection was so sever that they weren’t sure if he would survive the treatment, so they used some of his still healthy bodycells to clone him. Against all odds, both babies survived, though the clone eventually was kidnapped and raised by the Askani’s enemy, Apocalypse, who dubbed him Stryfe. [Cable (1st series) #7-8]
In the future world, the boy grew up as Nathan Dayspring, named after his surrogate parents, Redd and Slym Dayspring, who in fact, were the pre-prepared clone bodies animated by the time-traveling consciousnesses of Scott and Jean. When he was a young man, he met an Askani novitiate named Aliya. [Askani’Son #3] Together with several others, they founded Clan Chosen and fought the oppressive regime, including Stryfe. Not much is known about the next two decades, save that Nathan and Aliya married, and that she had a child named Tyler, who has been mentioned as adopted by Cable, so apparently he was not his biological father. Finally one day, Clan Chosen were attacked by Stryfe’s troops and Jenskot, Aliya’s chosen name in honor of Phoenix and Cyclops, was caught in the explosion of a thermo-grenade. She died in her husband’s arms. Also Tyler was nowhere to be found, evidently captured by the rivaling forces and brainwashed to serve Stryfe. [Cable (1st series) #1]
Eventually, both Stryfe and Nathan traveled back in time to the late 20th century, apparently a rather crucial era in Earth’s history, to alter the course of time. The brainwashed Tyler was sent after them, with the task of bringing them back, though he soon overcame his programming and started a secret agenda of his own, using such aliases as Mr. Tolliver or Genesis. Calling himself Cable, Nathan would have numerous confrontations with Stryfe or Tyler for years, before he learned either one’s true identity. [X-Force (1st series) #17, Cable: Blood & Metal #2, Cable (1st series) #5] In the end, though, it was Logan, and not Cable, who killed Tyler in Wolverine (2nd series) #100. Stryfe has seemingly died more times than anyone can count, but next to all of these reports having been rather exaggerating. However, he has yet to bounce back from his latest death, which occurred in Gambit & Bishop #6.
The main Marvel universe’s Mr. Sinister was not alone with his idea to turn the offspring of Summers and Grey into a weapon. His counterpart from the Age of Apocalypse went even further than he, not waiting for a child to be conceived the natural way, but instead using DNA samples of Scott and Jean to create an immensely powerful being in his labs, who received the name Nate Grey. At some point, Nate escaped, and he happened to be among the handful of subjects who crossed over from the Age of Apocalypse to the main Marvel universe. [X-Men Omega, X-Men Prime]
By accident, Nate provided the psionic ghost of Madelyne Pryor with substance, sort of resurrecting her. [X-Man #5] Several weeks later, though, she was apparently killed once more when she was in a rather weakened state, as some villain took her place and tried to manipulate Nate while posing as Maddie. [X-Man #52, 67] Nate sacrificed his own life some time later, when he discovered that an alien had been preparing the planet for harvesting by his race. Since this Anti-Man had already interweaved his own energy with every living being, Nate could not simply kill the alien. Instead, he discorporated both the Anti-Man and himself into pure energy, which was displayed through the Anti-Man‘s net, into every being on Earth. [X-Man #75]
As Jean further explored her abilities over the years, she eventually reached a level that allowed her to tap into the Phoenix Force from time to time and draw power from it. She would even act as the Force’s host for brief moments, allowing it to speak and act through her. Apparently there was some specific task the Phoenix had to fulfill, but unfortunately, Jean was killed by one of the X-Men’s enemies before the job was done. [New X-Men #148, 150] While her body was buried, her soul and essence entered the so called White-Hot Room, apparently some sort of afterlife, where the Phoenix pulls itself together once all of its pieces have arrived, only to again enter the never ending circle of creation and destruction.
For a group of renegade Shi’Ar, this was not enough. They wanted the Phoenix to be gone forever and, in order to destroy it once and for all, they had to resurrect it at first. Called back to life way before its time, the Phoenix was incomplete, vulnerable and confused. It fled to Earth, where it pulled Jean from the afterlife and resurrected her body, again wanting to merge with her. When Jean refused, the Phoenix angrily lashed out at Jean’s friends, and they struggled for quite some time with each other, before they came to an understanding. Accepting that they needed each other, Jean became one with the Phoenix, and again sacrificed herself when the Shi’Ar fired their lethal weapon on Earth. As the blast was about to hit, she prepared herself for entering the White Hot Room again, to await the Phoenix‘ missing fragments. [X-Men Phoenix: Endsong #1-5]
While the Phoenix eventually coming back is rather a question of “when” than “if”, Jean Grey is rather unlikely to return as the woman she once was. Now irrevocably merged with the Phoenix, her mortal existence is at an end, and any future appearance should be as a host or avatar of the Phoenix Force, as such functioning as the living embodiment of passion and joy of creation itself.
Freshly reminded of the near infinite power that the Phoenix could wield, the Shi’Ar wanted to make sure that no other member of the Grey family would become the next Phoenix, so they sent their Death Commando to kill every single member of the Grey family. The attacked during a party at John and Elaine Grey’s house, killing the guests one by one, including Gaylin, Joey, John and Elaine. Some of the many other victims (all of them being never before seen characters) were named and briefly introduced as
The only person left alive was Rachel, who the Shi’Ar branded with a large Phoenix symbol on the back, apparently to function as some sort of tracking mark. [Uncanny X-Men #466-468] For some unrevealed reason, the Shi’Ar either forgot about Cable or failed to recognize him as also being blood-related to the Greys.
The alternate universe in the Mutant X series revealed more possible offspring of Grey and Summers genes. In fact, there are now children for every possible pairing of Jean, Havok, Cyclops and Madelyne. In this reality, Scott Summers was captured along his parents by the Shi’Ar, when he was still a boy, and as such Mr. Sinister had only Havok’s DNA to work with. Whereas little Scotty was the natural born son of Havok and his wife, Madelyne Pryor, obviously named after Alex‘ missing brother, Mr. Sinister also created two more children by combining his and apparently Jean Grey’s cell samples. As Sinister only was interested in the male child, he turned the girl over to Gambit and his wife, Bella Donna, who adopted her and gave her the name Raven. In his labs, Mr. Sinister accelerated the boy’s growth and dubbed him X-Man, to be later used as weapon against his foes.