Definitions for "William"
William (II) was the margrave (comes terminalis, "frontier count") of the Marcha Orientalis, sometimes Ostmark (Eastern March) or Awarenmark (Avar March), in the mid ninth century until his death on campaign against the Moravians in 871. In his day, the march orientalis corresponded to a front along the Danube from the Traungau to the Szombathely and Raba rivers and including the Vienna basin. It was a military frontier zone against Avaria.