Heggestad/Blegen families from Hafslo, Sogn, Nor.

I am researching some family info for another family - Ole Torstensen stolen Thompson Heggestad (b. March 30, 1841)and his wife Dorothea Mathea Olsdatter Heggestad Blegen (1850). They are listed as emigrating from Hafslo, Sogn, Norway. I can find no information of them in my database of Luster nor can I find a farm name for either family. I would appreciate some assistance. Also, what does the word "stolen" mean? Thank you....