There was a Daniel Bollig born 20 Jun 1903 in Lyon Co, MN, a son of Anton and Ella (Engesser) Bollig. This Daniel died in Jun 1966 with a last residence of Mount Clemens, MI. The name, birth state and age are correct for the Daniel Bollig you found in the 1930 census (the husband of Violet), but the 1930 census indicates that his parents were both born in MN -- while Anton and Ella were both born in WI. If you have found additional info about Daniel, please let me know.