Info on family of Per Hallvardson Hovland, Ardal,

I am updating family history and would like some help on this family - Per Hallvardson Hovland (b. 1791, d. 1837) and Gunnhild Eiriksdtr Hovland (b. 1792, d. 1845). Did the following remain in Norway or emigrate to the USA - Torleiv, b. 1820; Sigrid, b. 1822; Hans, b. 1825; Anna, b. 1827; Marta, b. 1832; Gunhild, b. 1834 and Peder, b. 1836? I know Knut b. 1824 came to USA but where did he settle? Ole, Erik and Gjertrud all settled in Brush Creek Township, Faribault Co., Minnesota. Also I have some info that Per died in a tragic accident in 1837. Is there any record of "how" he died? I appreciate any help you can give me!