Isadore married Agnes Elizabeth Sullivan on Yes, date unknown. Agnes (daughter of George Emmet Sullivan and Elizabeth Sarah Davidson) was born on 23 Oct 1897 in Petaluma, Sonoma County, California, United States of America; died on 1 Mar 1957 in San Francisco, San Francisco County, California, United States of America; was buried on 4 Mar 1957 in Olivet Memorial Park, Colma, San Mateo County, California, United States of America. [Group Sheet] [Family Chart]

1. Elinor E. Offenbach was born about 1917 in California, United States of America; died on 25 Mar 2013 in Santa Monica, Los Angeles County, California, United States of America.
2. John Joseph Offenbach was born on 25 Jan 1921 in San Francisco, San Francisco County, California, United States of America; died on 23 Nov 1992 in Sacramento, Sacramento County, California, United States of America; was buried in Golden Gate National Cemetery, San Bruno, San Mateo County, California, United States of America.
3. Raymond L. "Ray" Offenbach was born on 19 Nov 1928 in San Francisco, San Francisco County, California, United States of America; died on 8 Jun 2010 in Novato, Marin County, California, United States of America; was buried in Hartley Cemetery, Lakeport, Lake County, California, United States of America.