Looking for grandfathers birth place

my father ernest c anderson was born in grantsbug wi. on july 29 1903 list his father as levi anderson born in norway in 1858 married sarah tollefson on may 7 1893 they had 2 other children in graintsburg wi lucy and lester. on the 1880 1890 and 1900 cences states my grandfather levi had a brother 7 years older than he his name is ole anderson and help i am at a dead end thanks Ernie Anderson [email hidden]