Liumstuen as a surname

My Great-Great-Great Grandfather Ole Anderson (-sen/son?) also has a name "Liumstuen" next to his name. I'm unclear whether that name "Liumstuen" is a surname or some kind of place name. Does anyone know if it's a surname or a place? I ran it through GoogleTranslate and I think it means "limestone" in English, so that only has me more confused. I believe he was born in Follebu, Østre Gausdal in 1826. He died in Barron County Wisconsin, USA, at some later date, though I'm not 100% clear on the year/date of his death. He was married to an Ølia Østensdatter. Their daughter, Christine, a triplet, is my maternal Great-Great Grandma. (I guess that last comment is a bit obvious.) Thank you.