"United States Census, 1870," index and images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MN6D-VWB : accessed 23 May 2015), Frank S Ingalls in household of Benjamin Ingalls, California, United States; citing p. 1, family 1, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 545,567.
The Genealogy and History of the Ingalls Family in America: Author: Burleigh, Charles: Publication: Malden, Middlesex, Mass.: Geo. E. Dunbar, 1903: Note: NS340613: Source Media Type: Book: Master Listing Source: Y
Frank is my great grandfather on my mothers side. His son Walter Spaulding Ingalls is my Maternal grandfather. Frank (and his wife Madora Spaulding Ingalls) were assigned to the Yuma Territorial Prision as one of his Army assignments. My mother Madora Preble ingalls married name Cowie, Walter's 2nd daughter by his 2nd wife was named after his mother Madora.
It may be possible to confirm family relationships with Frank by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Frank: