ósanngar

Could you clarify what ósanngar refers to? Is it a real term from a language or culture, a place, a person, or a fictional concept for a world-building project? If you want a wiki-style article, I can tailor it accordingly—either as a concise factual entry (with sources, etymology, history, and usage if real) or as a clearly labeled fictional entry for a fictional world. Which do you prefer?