I found a fantastic resource for the Gjestal area for early families in this area. It is in Norwegian so I used Google Translate to decode the basics as I went. It is called:
"GARDS-OG ÆTTESOGA FOR GJESTAL UTGJEVI AV GJESTAL KOMMUNE" by Søren Arneson.
In English the title is: "Farm and Family history of Gjestal for the municipality Gjestal.
This website has a lot of the people listed and their relatives (and it is in English):http://www.cft-win.com/showsource.php?sourceID=S000225&t...
The main surnames (regions at the time since surnames were based on birth location) are: Espedal, Håland, Lomeland, Edland, Eidland, Rage, Gjesdal, Nevland, Nesse, Madland, Kyllingstad, Bjelland, Sikvaland, Vølstad, Nordås, Oftedal, Svihus
Hope it helps anyone researching Norwegian family members from this area.