Ida Galaxy
From The Stargate Omnipedia
The location of at least one Asgard planet, Othalla. Though the first place (beyond our own galaxy) where SG-1 encountered Asgard, it is apparently a region of Asgard colonization. The Asgard's home galaxy is also called Othalla, implying that this settlement planet may have been named after their home galaxy.
KEY EPISODE
The Fifth Race - Colonel O'Neill is drawn to Othalla in the galaxy of Ida by the Ancients' knowledge that had been downloaded into his brain.