I located some paperwork from 1973 that settled the estate of Matt M. Castro, aka Mathew Castro.
The following names were listed in the paperwork: Mary Armetta (Campbell), James Oswald (San Jose), Evelyn Shaffer (Fresno), Frederick T. Castro (Sacramento), William C. Castro (Arnold), Albert Cardoza (Yreka), Charles Cardoza (Potter Valley), Wallace Cardoza (Yreka), Francis Silva (San Jose), Alice Flynn (San Jose), Dora Silva (Montague), Irving Cardoza (San Jose).
My grandmother is Evelyn Shaffer (listed above).Her father was Thomas Lewis Castro, who I believe was the brother of the Matt Castro listed above. I believe they had a sister named Mary, who was married to an Oswald. Thomas and Matt's mother's maiden name was Silva.
I am trying to put all of these relatives into the family tree, so I can gather information about my grandmother's Castro and Silva family.I know very little about my grandmother's family, and she is not able to help due to age and illness.I believe relatives still live in the San Jose area.Thanks for your help!