Knud Knudsen and Beret Jørgensdaughter

Knud Knudsen was born in North Aurdal in Oppdal in 1829. In 1855 he marrued Beret Jørgensdaughter, who was born in 1819. It is "told" that he had Three children: Knut, born around 1855, Hallvor, born in 1857 and Beret, born in 1859. They shall have left Norway and "gone" to you in 1861. Is it possible to find all this about them? Best of love, Anne Benum [:D]