Maveren and their thralls
A thrall of the Maveren is in service to either a House , or an individual Maver. They might be of any social rank, and perform any sort of work from labourer to high-level administrator. They are not slaves, technically, but their “patron” legally owns all their property and is only allowing them to use it. There are strict protocols around this, social and legal, and abusing one’s thralls is illegal or at least frowned upon, depending on the type of abuse. But it still isn’t a nice social system.
Ways to become a thrall
Semi-hereditary thralldom
The Maveren think their custom here is very reasonable and generous. When a thrall has a child, they can choose to sign the baby into their patron’s service, or to abstain so the child will be free. The Maveren respect this choice; if the child is free, it will be raised by its parents in the Maveren household, and then at age fourteen kicked out the front door and never aided by the household again—or by any of the household's members, including the child’s parents. What if the fourteen-year-old wants to stay in the household after all? Too bad, their parents should have known better fourteen years previously. Unsurprisingly, the majority of thralls choose to keep their children in the household.
Captured in war
Originally the most common origin, still the classiest. This might also include Houses fighting each other, as well as fighting others. Maveren don’t raid in order to gather thralls, but when they do, traditionally they offer the defeated a choice between thralldom or death. If you accept thralldom, you give your parole and are expected to abide by it. Maybe this is enforced semi-magically?
Debt
This could include a were-gild, in the norse tradition of the debt one owes for murder. Thralldom is a kind of criminal punishment for Maveren. There’s also debts of having saved one’s life. Purely monetary debts are rarer but still a thing.
Promotion for offsiders
In Malfa these days, a number of people work for the Maveren without being thralls, which puts them at the bottom of the food chain. For a servant, being offered thralldom is like being given tenure, at least from the Maveren’s perspective. A goblin urchin like Billy might work their way up to thralldom. This would put them at the bottom of the food chain within the household, but still they’re inside now.