During the Battle for Azeroth alpha, this place was called 8.0 Islands - Rock Spire - Prototype in the game files.
Speculation
This article or section includes speculation, observations or opinions possibly supported by lore or by Blizzard officials. It should not be taken as representing official lore.
The vrykul island of Jorundall may be named after the leader of the Bloodwake vrykul, Jorun.
[Jorundall Salvage] refers to it as "the northern island". With that and due to its inhabitants, Jorundall is probably located near Northrend and/or the Broken Isles.