A question that doesn't come up often enough: Where's the rest of Trevor's family?
We know the entire Belmont line was almost completely annihilated in a mob, but the series is pretty vague on how many people were actually living in the house. With a high mortality of the medieval period, families were often big and with an occupation as dangerous as hunting monsters, the Belmonts were probably no different. This was very much a 'survival of the fittest' and 'heir and plenty of spares' mentality.
Trevor lost his family at twelve, so it's very unlikely he was the only sibling. But even in the event his parents were extremely unfortunate and he was their only surviving child, the multiple siblings theory still applies to the previous generations.
So his immediate family was killed. What about the extended family?
In Lament of Innocence, Leon Belmont was a French baron, but he gave up his land and titles to rescue Sara. Following the storyline of the Netflix series, he then chased Dracula east and neither the games nor series ever mention what became of him other than the fact he fathered the entire bloodline.
Based on the games, it would be safe to assume the Belmonts are not part of the aristocracy, but as far as the series goes, they are mentioned as one of Wallachia's 'great houses' in the first couple episodes. They're not unknown to the Wallachian people. Plus, the reigning Prince of Wallachia did have the power to invest anyone he chose with a noble title. The real Vlad the Impaler actually made use of this power by elevating members of the lower classes, effectively ensuring their loyalty through gratitude. (Because if he was overthrown, things weren't going to go well for the people who benefited from his rise to power.)
So it's not impossible that somewhere in the 400 years between Leon and Trevor, some Belmont won the favor of Wallachia's monarch and was rewarded with a boyar lord's title.
'Not much of a family and not for long' seems to indicate the line was already pretty diminished before the mob attacked.
Trevor only mentions his family a handful of times throughout the four seasons, and the only specific members that come up are his parents with the reference to his mother's books and the story of how his father had once gotten into a fight with a Speaker.
The only other time his parents come up is in Season 2 when Sypha asks if they were magicians, to which he answers no, but they knew a lot about magic. At the very least, this shows both of his parents were alive long enough for him to remember them. Otherwise, the story about the fight with the Speaker could have easily been told to him by another relative that had been looking after him while the books Trevor mentions that belonged to his mother could have just been part of the family's collection after she was long gone.
With some historical context (provided we adhere to accuracy,) this actually gives some insight to Trevor's childhood. He would have known his mother very well. Unlike many other European countries where the nobility left childrearing to a nurse and other staff, the education of a boyar's son in Wallachia was actually left to the women of the household. His mother would have likely overseen every part of his upbringing that wasn't physical combat training, which would have been his father's domain.
Another possibility worth exploring is his mother was the Belmont and his father was the one who married into the family. An unusual if not unheard of dynamic for the times, but the series does subtly imply the women of the family were as much of hunters as the men when Trevor talks about how only one member of his family encountered the Infinite Corridor. It's possible they could have adopted other more non-traditional roles for the times.
This also accounts for his complete lack of surprise in Episode 3 when 'the Elder's grandchild' turns out to be a granddaughter and again in Episode 4 when Sypha reveals herself as a mage.
So we've established both of Trevor's parents were alive and well for a significant part of his early life. On to the extended family.
Unless the Belmonts were practicing Targaryen levels of incest (although marrying one's cousin was an accepted practice in this time,) Trevor should have had other relatives to rely on. Assuming the family had a traditional dynamic and his mother did indeed marry into the Belmont line, and since aristocrats generally married other aristocrats, her father would have been one of the boyar lords of the region. The same applies if his father had sisters who married into other families.
Given the primary goal of marriage in this time period was less romantic and more in the interest of forming alliances with other families for political or financial reasons, there could also be a wider family network among the nobility at play.
Side note: There's a small possibility he's distantly related to one or both of these two.
...
So what happened to those other relatives?
Personally, I think the answer to this question might play into the cynicism and bitterness of Trevor's character in general. If we explore the scenario that he did seek help from his mother's family, people who had no ties to the Belmonts other than the fact their sister/daughter married into the family, with the self-serving atmosphere of the Wallachian aristocracy at the time, I can imagine him being met with a cold reception.
And sadly, this would be an all too realistic situation for the times. As stated above, the boyars were corrupt.Ā There wasnāt a clear hierarchy among the nobility (That is, Wallachia did not have the equivalent of dukes, earls, viscounts, etc.) so power was determined by wealth or land-owning.Ā This rivalry for power went all the way to the top; Wallachia's throne changed hands once every couple years as the DÄneČti and DrÄculeČti branches of the reigning family relentlessly fought over it.
In this minefield of political intrigue, the only surviving member of an otherwise shattered bloodline, especially a twelve year old excommunicate, would not have been of much use in the eyes of the nobility. With the Belmonts disgraced with heresy charges, neither branches of the reigning family would have been interested in their support and probably would have wanted to distance themselves from an alliance that could potentially damage their own reputation.
A public rejection from the Prince would have rebounded throughout the region and put the final nail in the coffin of what the Church started. None of the boyars would have been interested in helping Trevor, distant family or not. On the other hand, helping their orphaned and disgraced nephew/grandson is the Christian thing to do, but since Trevor and his murdered family are now enemies of the Church and out of favor with Wallachia's monarch, that 'help' might've extended only as far as, "We're deeply sorry for your circumstances. Here's some money, now get out."
So Trevor was born into one of the highest and most privileged classes in the region and is the product of literally generations of a family that has had two goals since Leon: protecting the world from Dracula and the destruction of Dracula. The night of the mob would have completely shattered a mentality he'd had since he was born. Throw that on top of that the trauma of losing oneās home and entire immediate family in a single night and then being vilified by both the people his family had protected and the wider circle of his extended family.
That is a brutal shift in world views for a twelve year old to handle, so it's easy to see why the series opens with him already burned up the anger and the grief over what happened and all thatās left for himĀ is the aimless wandering, drinking, and getting into fights.
In all, this statement really summed up the beginning of his character arc perfectly.
