Aivahnstyn was a town in Cliff Peak Province, where the South Daivyn River met the Daivyn River.  It was connected by road to Marylys, to the north, and Sangyr, to the south. (Map)

During the Siddarmark Civil War, it fell without a fight, because General Charlz Stahntyn, commanding the fifteen-thousand-man garrison, had withdrawn south towards Sangyr, however his forces were slaughtered before they could reach it, during the Battle of Sangyr. (MTAT)