It's the name you put into the login screen for the game
Stormproof: Vibeke - 50 EP mDragonknight | Savi Dreloth - 50 EP Magsorc | Sadi Dreloth - 50 EP Magblade | Sigtric Stormaxe - 50 EP Stamsorc | Valora Dreloth - 50 EP Magplar | Sigtric the Unbearable 50 EP Stam Warden Scrub: Chews-on-Beavers - 50 EP DK Tank | Vera the Wild - 50 EP magicka Warden | Sigtric the Axe - 50 EP Dragonknight Crafter | Sigtric the Blade - 50 EP Lost Nightblade | Sigtric the Savage - 50 EP magicka Templar | Vibeka Shadowblade - 50 Ep Stealthy Ganky Nightblade |
Your forum name can be different from your account name. Your ingame @name is what you type in the "username" part of the login screen when logging into the game. It will also be the name you see on all group-related menus, like group widnow(P on PC), friendlist(O on PC), right in the top left corner