In the 1920 census, he's in Virginia, St. Louis County, with the family. In 1926 he got married and in 1930 he's in Superior, Douglas County, Wisconsin with his wife Blanche and niece Elizabeth Jean (or Betty Jane) Larson, born in Wisconsin in 1926. It's possible his wife's maiden name was Larson, or one of four sisters married a Larson, and then she died. In doing searches under the name Larson for his sisters, nothing comes up. In 1940 they're in Milwaukee. And William and Blanche both die in California. He was in the Navy in both world wars.