Her name is recorded in the death record of her son, William Dean Sievert. [1]
Sources
↑ Minnesota Department of Health; St Paul, Minnesota, USA; Minnesota, Death Index, 1908-2017. Certificate Number: 2016-MN-014207.
"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M2G7-9CH : accessed 23 Oct 2014), Elsie C Pierson in household of Charles C Pierson, Minneapolis Ward 3, Hennepin, Minnesota, United States; citing enumeration district (ED) 50, sheet 3A, family 48, NARA microfilm publication T624, FHL microfilm 1374714.
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