This is a fairly broad question, and although it would be possible to just list a few NPC names, I think it's more intersting to look at why the question of Carlins oldest families doesn't have a simple answer. Carlin didn't grow the same way as most other Tibian cities, and that has a big impact on who could realistically be considered an "old" family there. Because of that, it helps to start with how the city actually began, its early history pretty much explains why only certain families end up mattering at all. Since you were also asking for a timetime, this seemed like the best way to approach it.
You see, Carlin isn't actually that old of a town, and that's important to understand when talking about its oldest families. It wasn't founded as an independent city at all, but as a Thaian project. King Xenom, brother of Elorana and father of the current Thaian king, Tibianus III, tried to establish a model city in the north that would act as a base for northern colonisation. The idea looked good on paper, but in reality the area was under constant orc attacks, supplies were unreliable, and very few people were willing to move there voluntarily.
To keep the project alive, Xenom began using Carlin as a place of exile. Political opponents, unwanted thinkers, troublesome nobles, and anyone who openly disagreed with his rule were sent north instead, accompanied by the Red Legion, the elite and feared royal army. Living conditions were terrible. Food was scarce, the Legion ruled harshly, and it didn't take long before unrest turned into open rebellion. The Red Legion responded brutally, imprisoning rebels in the enormous castle and forcing them to live and work under even worse conditions.
This early phase already explains a lot about why Carlin doesn't really have ancient noble dynasties. Most of the people send there had already lost their status, wealth, or political power. Even nobles who ended up in Carlin were there because they had fallen out of favour, not because they represented powerful houses meant to thrive. As a result, there were very few families in the founding generation who could establish lasting prestige. Carlin didn't start with great houses, it started with survivors.
Elorana herself was among those forced to live in Carlin, and she had friends among those who rebelled against Xenom. She appealed to her brother to help them, but Xenom refused. With no help coming from Thais, Elorana began plotting to bring the Red Legion down. To do that, she needed allies who were already deeply tied to Carlin's survival.
Those allies were the druids. In Thais, druids had long been overshadowed by the Sorcrerer's Guild and its close relationship with the throne. In the north, the found something different. From the earliest days of the Carlin, druids were essential. Providing food, healing and guidance in a hostile land where conventional supply lines often failed. Over time, they became trusted advisers and quietly shaped the city's development. This makes the druids the oldest continuous and loyal presence in Carlin's history, predating almost every notable family that would rise later.
The downfall of the Red Legion was not a neat or bloodless event. After the Legion launched a devastating attack on the orc stronghold, the surviving orcs and their allies retaliated in overwhelming numbers. Orcs, cyclops and minotaurs stormed the castle and construction site, slaughtering legionnaires, workers, and prisoners alike. Entire sections of the complex were turned into mass graves, and hundreds died in brutal close-quarters fighting. By the time Eloranas forces arrived, most of the damage had already been done.
What remained of the Red Legion was shattered, exhauseted, and no longer capable of holding the city. Faced with internal unrest and external threats closer to home, Thais withdrew its remaining forces rather than attempt to retake Carlin. Only then did the city truly become independent, and Elorana was crowned its first queen. It is worth noting that this moment of freedom came at an enormous human cost, further reducing the number of early Carlin families that could have survived intact across generations.
Only after independence could Carlin begin to form families of lasting influence. The earliest of these was the Bonecrusher family. Their name is tied to Bella Bonecrusher, a legendary warrior who rallied Carlins women during the dangerous years that followed independence. Her legacy endured, not just in storied, but in blood. The Bonecrushers became a military family, and that line is still very much alive today. Today, Bunny, Busty, bambi and Blossom Bonecrusher guard Carlins gates and castle. Beyond the city, the family name appears again and again: Brianna Bonecrusher authored The Art of War, Polgan Bonecrusher is buried on Rookgaard, and a Venorean guard named Arnold has been revealed to be a Bonecrusher by birth.
Other old Carlin families rose later, once the city was stable enough to invest in expansion. The Windtrouser family belonged to this later nobility. They invested heavily in colonisation of the region now known as the Ghostlands. That venture failed catastrophically. Settlers went mad, druids were lost trying to cleanse the land, and the area was eventually sealed off as cursed. The Windtrouser fortune was destroyed along with the project, leaving Dalbrect Windtrouser as the last known representative of a once-prominent Carlin family.
Trading families followed a similiar pattern. The Rugby trading house rose during Carlins push toward northern trade, especially the establishment of the Svargrond outpost. Marcia Rugys exploits among barbarians and in the frozen north mark the point where Carlin shifted from survival to exploration. Thought she never returned from her final voyage, her family represents one of Carlins earliest mercantile lineages.
So when asking who the oldest families and NPCs of Carlin are, the answer isn't found among ancient dynasties or founding nobles. Carlin began as a place of exile, bloodshed and rebellion, and many early lives were lost before families could take root. Its oldest enduring names belong to those who rose after independence, the Bonecrushers, the fallen Windtrousers, early trading houses like Rugbys, and above all the druids, who have stood beside the city since its darkest days.