Parmandur
Book-Friend, he/him
As far as I know the culture on the sword coast doesn't really differentiate until you get Amn. I could be wrong but that's how I always saw it.
Ethnicity isn't as rigorously thought out in FR as in GH: largely because Greenwood's interest was in finding a way to "say yes" if his players wanted to play any given type of person they wanted to ("yes, there are black nobility in Cormyr, of Turkish descent, and you can play one!"): as such, the Sword Coast is actually a diverse melting pot of different cultures, like North America. This is actually one of the features that makes WotC happy with the Sword Coast as a default. The ethnicities described in the Player's Handbook are those who are common on the Sword Coast, and this is followed through on the adventure products.
Greyhawk has more of a grizzled history buff war gamer attempt to detail the lines of traditional conflict.
Different goals.