Guild Wars 2

So, We have one copy of GW 2 with one cd key and we have 2 arenanet accounts, one with the gw2 cd key registred on and one with Gw 1 cd key registred on.
The question is: if my brother delete his account can i use his cd key of GW 2 on my account?

Sorry for english, i’m from italy

Nope, My brother wanna give to me his copy of the game but i wanna use it with my arenanet account

Hi people.
If I delete my account and make a new one, can i use the same GW 2 Key for the new account?