Death certificate for Julia J. Blumer gives her birth/death dates and places. It also gives her parents as Geo. W. Weller and Elizabeth Dennis, so probably her birth name was Julia J. Weller.
Fridolin L. (Fred) Blumer married (1) Magdelana Stucy and (2) Julia J. (birth surname not known)
Obituary of Fred L Blumer, 1921 has his (second) wife's name as Julia J. Blumer.
"United States, GenealogyBank Historical Newspaper Obituaries, 1815-2011", database, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:Q53F-D77W : 18 July 2020), Fred L Blumer, 1921.
"California, County Birth and Death Records, 1800-1994", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QP74-4XHS : 1 March 2021), Fred L Blumer in entry for Julia J Blumer, 1932.
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Featured National Park champion connections: Julia is 18 degrees from Theodore Roosevelt, 24 degrees from Stephanus Johannes Paulus Kruger, 18 degrees from George Catlin, 20 degrees from Marjory Douglas, 27 degrees from Sueko Embrey, 18 degrees from George Grinnell, 29 degrees from Anton Kröller, 19 degrees from Stephen Mather, 27 degrees from Kara McKean, 20 degrees from John Muir, 22 degrees from Victoria Hanover and 29 degrees from Charles Young on our single family tree. Login to find your connection.