It sounds like we are searching for the same ancestors. Based on the Kvinnherad book, Vol. 3, it looks like our line also goes back to the 1600s. I have verified some of this information by looking at the original parish records in the Archives in Bergen.
What is the immigration date of your Hauglands? Ours is 15 Apr 1878 from Bergen on the National Line when Jens and Kristi emigrated with some of their children. Two other children came a year later.