I'm looking at page 8 of...
Battle of Bloodmarch Hill
(PZO9091), the first book of the Giantslayer campaign - namely the town statistics for Trunau.
The population is made of a large number of humans and of several other core races, with the less featured being gnome (10 gnomes in Trunau) and elves (at least one elf, Silvermane, is a long-time resident of Trunau) being grouped in the generic "other" entry.
So, I suppose there might be 25 different races with one exemplar each or, at the other end of the spectrum, at least three races with at most 9 individual inhabitants each (9+9+7 or 9+8+8).
We also know that no full-blooded orcs live in Trunau, only half-orcs, so the main race of the Belkzen region is out.
Are some other races officially represented in Trunau? As in, is there any published material that tells us that some individual of any other race lives there?
If not, is there any hint to what kind of creatures could be the most probable residents of those at least two other races?