Lovstad family

I am searching for any information on the Lovstad family. My gm came to the US (Westby, Wisconsin) in 1904 using the name "Lovstad"; her sister-in-law and 2 children came in 1905 using the same name. I cannot find out anything about the rest of the family using this name. The family lived in Ostre Toten near Skreia, were a part of the Totenvik parish, and the father, Ole Lovstad, worked on the "Vang" farm. Thanks in advance to anyone who can help.