Richard married Agnes M. Davidson on Yes, date unknown. Agnes (daughter of Alexander W. Davidson and Charlotte Beatrice "Lottie" [---?---]) was born in Apr 1893 in Santa Clara County, California, United States of America; and died. [Group Sheet] [Family Chart]

1. (---?---) Pfeiffer was born on Yes, date unknown.
2. Joseph D. Pfeiffer was born on 9 Feb 1914 in Santa Clara County, California, United States of America; died on 2 Oct 1961 in San Mateo, San Mateo County, California, United States of America; was buried in Golden Gate National Cemetery, San Bruno, San Mateo County, California, United States of America.