Well, I appear to be wrong -- scanning down some earlier entries, I see there was an Ersland in the US earlier in the 1800s (Anfin). It appears he also came from Hordaland (the same region the Bomlo is in) but from a different municipality (Skånevik, not Finnås on Bomlo island.) Since Norwegians didn't have fixed surnames at the time -- that only happened toward the end of the century and early in the 1900s -- they used their father's name (patronymic) and if further certainty were required they used their farm name. But if they moved from one farm to another their farm name changed too -- though in some cases if they moved to the city they kept their previous farm name. So...Anfin Ersland may have originally come from the same farm on Bomlo that Peder and Lars Andreas Ersland/Eritsland did, moved off the farm and then emigrated? Or came from a completely different farm also named Ersland? (In which case there are likely 2 unrelated branches of Erslands in the US). It would take tracking his forbears in Norway to see whether they connect with the Bomlo folks.