Aust-Agder

Hi My cousin and I have two different birth places for our great-grandfather Svend Terjeson's family. For Svend I show Øyestad Aust-Agder Norway and he shows Omholt Songend Norway. We both show his son Terje born in Øyestad. For Cathrine Larsdatter I show Fjaere Aust-Agder Norway and he show Lunne Eje Norway I know there are farm names that come into play - I have an Øyestad Bygdebak but I do not undertand it. Can you help me with what would be the village, county and farm names? Thank you so much. Ellen