Peter Voiss, Alameda County, early 1900s

Researching life of Peter Voiss, b near Cologne, Germany 1862-1867. Died in Alameda, CA in 1946. Immigrated to America around 1891.Lived sporadically in SF Bay area 1900-1946.Brother Gottfried, lived in Chicago in 1900, a druggist.Peter had a nephew William b 1905 in ILlinois, d 1975 in Oregon; William's son Daniel was b 1929 in Oregon, d 1997 in Oregon. Peter's father owned a brewery and inn in Germany. Peter never married.Anyone know this family?