Council of Thieves
From the Players Guide:
The Barrowood, just north of Westcrown, holds a small elven settlement. In the last few decades, some elves have drifted from the woods. A few left the country altogether, while others settled in small communities within Westcrown and other Chelish cities.
Elven communities tend to be insular and mistrustful of humans and tieflings entering their districts; humanoids of other types are met with less hostility. In particular, elves are greatly suspicious of human nobility in Cheliax, for it is here that the devotion (be it legitimate or lip-service) to Asmodeus and diabolism are most common. As a result, elves in Cheliax are more likely to be found dwelling among the poorer folk rather than amid the higher classes.
Elves are listed in greater detail on the PFSRD. As with all the races, feel free to customize to your heart’s content, following the standard rules for swapping racial features.