There is a very high percentage of fair-skinned, red-haired people with blue or green eyes in the Southern Reaches.
Children born outside of marriage take the name “South” in place of a family name.
People don’t keep dogs as pets here because it seems to enrage the Gnolls that attack periodically even more.
When House Videson began the War of Aros to unify the Human lands they began by offering treaties to the other Human nations. The Southern Reaches (being largely fishermen and farmers, with little actual military might) accepted the offer and joined Thellerg peacefully along with the people of the Plains.
Some shrines to other deities are revered on a small scale (in particular there is usually a shrine to Racha in fishing villages and often an altar of Alwen in farming communities), but usually as a supplement to (and not a replacement for) the Church of Enelwing.