Anton Sundt son of Petter Sundt, Kviteseid

Petter Sundt born 1844-1907, captain of steamship ?? never emigrated. Buried at Old Church in Kviteseid. His son, my grandfather, Anton Sundt, born 1873, emigrated probably around 1890-1898 with older brother Alfred to Stoughton, WI. Married in Dane County, WI Oct. 1900. Just looking for any info on the family and how/when they emigrated.