Share 'Looking for Lost Aunt last address San Francisco'

Trying to track down information on family of G-Aunt Bridget Rowan last Address was 499 28th St, SanFrancisco I have a letter from her dated May 13 1939 she stated her son or perhaps grandson Eddie was injured building the Golden Gate Bridge. I can not find any more information on her I thought perhaps there might be an Obituary somewhere that would list her family Would appreciate any help or st…