No, I knew them before the community. Although-- trolls?

I have never heard of 'Alterniia' before - the nine realms include Asgard, Midgard, Svartalfheim, Vanaheim, Jotunheim, Alfheim, Muspellsheim, and Niflheim.

No, I am not. Humans called us gods - for mentions of us are found in their myths and legends.