On the 1920 + 30 census she is listed as Matilda M. Still searching,
Edited to add from findmypast
Samuel
Middle name O
Last name Beauregard
Sex Male
Birth date 04/12/1872
Birth place California
Year 1947
Death date 09/08/1947
Death place Napa
State California
Country United States
Father's last name Beauregard
Mother's last name -
Record set California, Death Record Index, 1940-1997
Category Life Events (BDMs)
Subcategory Civil Deaths & Burials
Collections from Americas, United States