---------Wow Wiki Says----------
"Northeron is the name of a location where some of the Wildhammer dwarves lived. Some of the dwarves in the Second War came from Northeron. Northeron was known for its mysterious ironwood tree forests, the torrential storms from its frozen mountains, ominous and foreboding peaks, and jagged ice cliffs. It is said that a gryphon aviary was hewn from solid rock by the dwarves of Northeron. The feral dwarves of the Northeron wildlands offered the service of their Gryphon Riders to assist in the decimation of the foul orcs who had desecrated their homeland and slain the leader of the Alliance forces, Lothar, in Blackrock Spire assault. Chief Thane Kurdran Wildhammer of Northeron was the most famous of these Gryphon Riders.
It appears to be a separate realm from that of the Aerie Peaks region as both locations are mentioned in Day of the Dragon. It also appears to have nothing to do with Northrend which is mentioned separately in the book. " So I would think this is a wildhammer alliance zone housing Cailia Menethil and the survivor's of lorderon :)