No relationship is stated, but I have linked him to Wilhelmina as brother due to their close ages, birth place, and enumeration together in the 1870 census.
Sources
"United States Census, 1850," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:M445-MN1 : 21 December 2020), Charles Hoffmon in household of Wm Hoffmon, Hilltown, Bucks, Pennsylvania, United States; citing family , NARA microfilm publication (Washington, D.C.: National Archives and Records Administration, n.d.).
"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZLR-JS3 : 17 October 2014), John Rodrock, Pennsylvania, United States; citing p. 23, family 146, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,812.
Find A Grave, database and images (https://www.findagrave.com : accessed 07 February 2020), memorial page for Charles E Hoffman (1848–1912), Find A Grave: Memorial #61639553, citing Beulah Cemetery, New Britain, Bucks County, Pennsylvania, USA ; Maintained by Rebecca Evans (contributor 47327811) .
Is Charles your ancestor? Please don't go away! Login to collaborate or comment, or ask our community of genealogists a question.