Wallie married Sylvia "(née" Scalmanini; 1885–1955) in San Francisco on May 4, 1910. Sylvia's father, Carlo Scalmanini (1820–1891), had been a California Forty-Niner, a major vineyard owner-winemaker, co-owner, with Baptiste Frapolli "(Italian spelling," Battiste; 1821–1890), of the Swiss Republic Restaurant at 19 Long Wharf, and, with Frapolli, a wholesale and retail grocer. Wallie and Sylvia had one child, a daughter — Harriett C. Herzer (1911–1999) who married Colin Arthur Moreton (1910–1991).