"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MH8N-H9J : accessed 13 July 2019), Lucienne Dumas in household of Josephine Dumas, Somersworth Ward 3, Strafford, New Hampshire, United States; citing ED 184, sheet 1B, line 72, family 14, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1009; FHL microfilm 1,821,009.
"United States Index to Alien Case Files, 1940-2003," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QK8N-BSBF : 10 February 2018), Lucienne Dumas, ; citing Immigration, Alien Registration Number 6753890, "Index to Alien Case Files at the National Archives at Kansas City, ca. 1975 - 2012," NAID 5821836, Records of U.S. Citizenship and Immigration Services, 2003 - 2004, RG 566, National Archives at Kansas City.
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DNA Connections
It may be possible to confirm family relationships with Lucienne by comparing test results with other carriers of her ancestors' mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Lucienne: