weitz family info

Looking for Weitz family tree info. My grandfather was Louis
Harry Weitz, born 1913, died 1978 in Calif. His wife, my
grandmother was Frances Virginia Adams, she was born in WA.
1920, and died April 15th this year.They had 2 children, Louis Robert Weitz, my uncle, and Virginia Louise Weitz my mother.They lived in Baldwin Park, Calif. for a long time.
They are both buried at Rose Hills cemetary in Hacienda Heights Calif.I know my grandfather had 1 sister Dorothy, who is still alive somewhere near Escondido, Calif. Thank you in advanced for any help you may give me.