https://chroniclesofelyria.com/news/19399/Part-of-Something-Noble-and-Purposeful
Villager Tokens
• Notoriety: Each token a settlement receives increases the notoriety of the settlement. This is an in-game mechanic that factors into the Reputation & Fame system. More notoriety means an increased chance that NPCs will seek out your settlement, and communicate your organization to other PCs and NPCs.
• Population: Each token increases the population of a settlement by 1, with you, in theory, being at least 1 of those citizens. Population slots unclaimed by player characters will be filled by NPCs.
• Expansion: An additional parcel of land will be added for every 3-5 tokens, depending on the type of settlement
Guild Tokens
• Notoriety: Each token an organization receives increases the notoriety of the organization. This is an in-game mechanic that factors into the Reputation & Fame system. More notoriety means an increased chance that NPCs will seek out your organization, and communicate your organization to other PCs and NPCs.
• Research Points: Each token increases the Research Points of a school, or the resources of an organization by a small amount.
• Expansion: Each 15 tokens grants the organization an additional building or add-on. This can be used to expand an existing establishment, or lay down a new one.
I would assume it would be of whatever is in that settlement. If it's a full Neran settlement, it'd make sense for it to be Neran, if it was both Brudvir and Hrothi, then it'd make sense to be a random of the 2 or the majority tribe.
The tokens adding population, to be honest, isn't that big of a thing, because you can buy NPC packs with EP