I found a family book with the following excerpt "Tiltrem is located on the Norwegian Sea near Jossund, southwest of Afjord. Teksdal and Aastoa are not directly on the water, but are inland a few miles."
I looked on a map and thought it was spelled Aasloa---can someone tell me which is correct?
It most likely is Aastøa or Åstøa. If you can use this map SØK - Åstøa (Gårdsbruk), Bjugn, Sør-Trøndelag. and with the right zoom you will see both Åstøa and Teksdal.