Not sure if they even named it after this, but if they did it is pretty common for games to do things like this and it isn't really 'stealing' in most cases if a developer likes a game they usually add something that relates to it in some way, same applies to anything else they may like such as movies/songs

Even then it's pretty hard to create a unique name that isn't already used somewhere, you could screenshot anything on Graal and link it to other games even if not intended