Allow me to tell you the story of graalonline as i was told.
Originally, it was an online version of legend of zelda: a link to the past, but nintendo sued these creators, so they then had to reconsider a name. They came up with graalonline, as a reference to the holy grail, since graal is french for grail, thus graalonline was born. They chose graal because unixmad, the CEO of graalonline,is french.
Im only sure on the accuracy of 75% of what i posted, if theres a different story then please enlighten me. This is what i heard, im jsut passing my knowledge on.