The Origin Theories
(I do not own these images, nor do I own Hunter X Hunter. These are a set of theories I have, take them as seriously as you wish!)
Zeno Zoldyck X Isaac Netero
The theory I have is that Zeno Zoldyck's wife is Isaasc Netero's daughter and Chairman Netero agreed under the condition that he would produce a descendent that could rival his power. This is why the Zoldycks are in the assassination business.
Although I do admit that this is a "wouldn't it be interesting" theory, yet it would explain why they are so close and why they still hang out. Also Zeno once did call Chairman Netero "old geezer" in the dub and also did state that even as a baby Chairman Netero was an old man. Plus we have met his son, which we did not know about until he was introduced, so why not have a daughter too? Yet I thought that it was an interesting theory that I had.
If you have found any evidence for or against this theory comment below.
Silva X Gold
Zeno Zoldyck had not one but two children, a son who we know to be Silva and the second, a daughter called Gold and she, like Killua, left the family at a young age to pursue her own goals. My theory is that she looked very much like her father but acted more like her grandfather. This developed into a list for fighting, which I think Chairman Netero had.
The reason that I believe that Zeno had two children and not one is because I find it strange that Silva had multiple children and Zeno had one. I also think that why Mr Togashi keeps focusing on this family is because there is going to be a big twist that will happen concerning this family. The only other family that he seems to focus on throughout the manga being the Freecss. Also there is the old song silver and gold.
Again, if you have found any evidence for or against this theory comment below.
Gold X Mr Morow
When she was in her early twenties Gold found and fell for a man, who we will call Mr Morow and married him. They had a son who we know to be Hisoka, who looked and was a lot like his mother and was closer to her rather than his father. At the age of twelve Hisoka came home to see his father dead and his mother missing along with the evidence of his existence. This was due to Silva not approving of the marriage and killing Mr Morow and Gold took all evidence of Hisoka's existence with her to protect her son. This left Hisoka to go and find his mother for answers only for him to become distracted and soon either gave up or forgot about finding her.
This theory came from the idea that Mr Togashi only brought up Hisoka's lack of focusing on his part, via Machi is because his past is a time bomb! I also find it interesting that Hisoka, especially in the 2011 animé, looks like what you would expect a young Zeno would look like only with white hair and blue eyes, meanwhile Zeno looks exactly like what Hisoka would look as an old man, just with amber eyes. Not to mention, both Hisoka and Illumi have similar body shapes, similar genetics? On top of that, they do have similar eyebrow shapes.
Again, if you have found any evidence for or against this theory comment below.
Gold X Ging
During this time Gold went throughout the world and her agonophilia ( Agonophilia is the paraphilia involving sexual arousal derived from the act of fighting, or participating in or observing a combat sport, such as wrestling, boxing or kickboxing, martial arts, etc., or from viewing depictions thereof; from the Greek "agonos" (combat, struggle, conflict) and "philia" (love of). Agonophilia often also involves the fetishizing of the equipment associated with combat sports (i.e. boxing gloves/trunks, safety gear, martial arts uniforms, etc.)) led her to find and fight and kill strong opponents. (just think of a Hisoka in breasts) Then three or four years later this drive led her to a strong and young hunter the age of nineteen or twenty called Ging. They fought and he won, this led to a very unprotected night of passion that led to the conscription of Gon.
This theory came from a YouTube video highlighting just how alike Hisoka and Gon personalities are. Looking through this lens I noticed that there were some expressions that Gon would have that I could see on Hisoka. Then there is the fact that if you look at Ging even though they do look alike, they do have fierceness in their appearance, such as their eye shape and eyebrows shape. Yet there are others that had those types of eyebrows and they are Hisoka and Illumi, yet as for the eye shape Gon's eye shape is similar to Alluka and furthermore, there are expressions that she has that are almost identical to Gon's. Also when you look at "adult" Gon he does look similar to Illumi, just with narrow eyes, yet if you look at Gon's body it does look similar to Silva's and not his father. Again I can say that one's body size can be determined by genetics.
Also I can not see Ging getting married and I can see this being the conception being more credible. I thought that it seemed like Mr Togashi is purposefully trying to keep Gon away from senior Zoldycks, like the Zoldyck family arc, where Killua was let go, York New family arc, they left the moment that they were not getting paid, the Chimera Ant arc, where Zeno hardly paid attention to him and Silva was too far to be seen. Then I would find it interesting that Killua brought this up only for Mr Togashi to repaint that moment with a touch of irony as Killua would be, unknown to him, the nephew of the woman that he is asking about. Also, even while Killua was spending his time at Gon's was prevented from learning about Gon's mother via Gon pressing pause before even hearing her voice.
Again, if you have found any evidence for or against this theory comment below.
Name X Name
Here I think that Ging used both his and Gold's names in crafting Gon's name, using their common first initial being G the next, O came from Gold's second initial of her first name and the final N coming from Ging's penultimate letter of his name.
This theory came from the Greed Island arc, having the name of the game Greed Island coming from the names of each of the creators of the name. (Regardless of the name change!) Which could have been a tip Ging made to tip Gon off how he came up with the boy's name.
Again, if you have found any evidence for or against this theory comment below.
Gon X Calamity
When Gon was born he was born as a calamity, like Alluca. When both Ging and Gold recognised this Ging sealed away his true power, as a calamity away in order to save his life. After this, Gold waited for the baby Gon to reach a point when he could survive without his mother and left to the Dark Continent to obtain information on calamities. This would then help Gon and keep Hisoka's existence secret. After he set up Greed Island as well as other obstacles to train the boy up to be able so that Gon's body would be strong and tough enough to handle his power when it would wake.
This came from the fact that when people came back from the Dark Continent they would always bring back a calamity, such as when the Zoldycks came back Nanika was born into the Zoldyck family inside Alluka. So the question is where is the Freecss calamity? Well from Alluka we can assume that a calamity does not have to come back right away. So what if the Freecss calamity was looking and smiling at us from day one?
Gon seems to heal faster and is stronger than a normal human. Then there was the fact that Wing seemed to show a great nervousness after waking Gon's nen up and calling him a great or terrible beast. Then there was his progression of learning nen being faster than normal and he showed frightful levels of potential. He even broke the glass Wing was using when he started pumping his aura into the glass making the water increase to a point the glass cracked.
In the Greed Island arc Bisky commented that the whole game was set up specifically to make Gon stronger, which would make sense if Ging knew that his son had to be trained to survive awakening good true power if he did not then Gon would have died. In the Chimera Ant arc, Pitou commented that Gon, a human, could sink his teeth into the king. Who we know was a dangerous and powerful being in the first place.
Again, if you have found any evidence for or against this theory comment below.
Ging X Mito
After this he went immediately to Whale island to visit his grandmother and his cousin Mito. There he did something purposely to provoke either his grandmother or Mito to gain guardianship over Gon so that he would grow up in a nen free environment minimizing his chance of waking his nen before he could handle it.
The evidence I have for this is how Ging was able to manipulate the Zodiacs into accepting his rules and he was able to predict several things throughout the animé and manga. So manipulating Mito into gaining custody of Gon would have been easy. This way he would have been able to give his son the best chance to have a normal life, yet knowing better he gave her the box, which is yet another indicator that this theory is true. After all, why would he have it on him if it was surpassed to be a visit out of the blue?
Again, if you have found any evidence for or against this theory comment below.