Peter and Sonova Hogenson - Emigrated 1854

I am searching for the birthplace in Norway of Peter Hogenson who immigrated to the USA in 1854 with his wife Sonova Bryildsen. He lived in Wisconsin until 1863 after which he moved to Olmsted County, MN. He had 7 living children including Hogen Merrill Hogenson, born 1857 in Wisconsin, who later homesteaded in Polk County, MN. Thank you for any help you can give me. Kathleen Sigdesad kathysig