"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MCB6-483 : 9 November 2014), Hannah M Acker in household of John Mc Niff, New York City, ward 16, New York, New York, United States; citing family 639, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
"New York State Census, 1855," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K676-P5K : 19 November 2014), Hannah Acker in household of Cornelious Acker, E.D. 6, Ward 16, New York City, New York, New York, United States; count clerk offices, New York; FHL microfilm 1,018,661.
It may be possible to confirm family relationships with Hannah 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 DNA with Hannah: