Here's another 2-page spread from the Monster Overhaul.
The 10 entries in the "People" section all have useful tables.
Mercenaries have Missions. Peasants have names,
appearance, odours, and items. Townsfolk have slightly fancier names and
professions. Adventurers have elaborate D&D-style names, notable
features, D&D-ish skills and professions, and specialty tools.
idea, and this will be explicitly stated in the introduction, is that tables can be mixed and matched. Use one name table
instead of another. Roll for random items, unusual professions in town,
or strange mercenary skills. Setting-specific name tables will help.
This is especially important when it comes to "us" vs "them" and Barbarians. A Monster Manual without an entry for Barbarians would feel incomplete, but the entire core trope of D&D barbarians is stereotyped: people from Foreign Parts who do X and don't have the same nice stuff we have Around Here.
As long as everyone's still treated as people, I suspect it'll be fine. It's more interesting that way.