Unknown 700(Austria)
Editor of DKAR 1:169 thinks this is on Salzbach river, a tributary of the Krems, which enters it downstream from Achleiten, Steyr, Upper Austria.
Unknown 713(Medieval Territory)
Editor of DKAR 1: 169 identifies Nordfilusa as the region around the northern Vils (a tributary of the Danube, which flows into it by Vilshafen, Niederbayern).