Hello Gabriele.
I found one more clue pointing to Georg H Hoffmann in the FindAGrave record is the son of Bernhard Offmann.
Georg and Maria Anna/Mary Evers/Avers had a daughter named Bernardina. Bernardina's married last name was Uhling, she was born on Aug 1850 or 1851 and died 23 January 1910.
Name: Bernadina Uhling
Event Type: Death
Event Date: 23 Jan 1910
Event Place: Cincinnati, Hamilton, Ohio
Marital Status: Widowed
Race: white
Occupation: housework
Birth Date: 20 Aug 1850
Birthplace: Cincinnati, O.
Father's Name: George Henry Hoffman
Father's Birthplace: Germany
Mother's Name: Mary Avers
Mother's Birthplace: German
Citing this Record
"Ohio Deaths, 1908-1953," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X8Z1-2TP : 15 August 2019), Mary Avers in entry for Bernadina Uhling, 23 Jan 1910; citing Cincinnati, Hamilton, Ohio, reference fn 2683; FHL microfilm 1,927,279.
According to the 1900 US Census, Bernardina was born Aug 1851.
Name: Bernardina Uhling
Event Type: Census
Event Year: 1900
Event Place: Precinct I Cincinnati City Ward 23, Hamilton, Ohio, United States
Marital Status: Widowed
Race: White
Number of Living Children: 1
Birth Date: Aug 1851
Birthplace: Ohio
Father's Birthplace: Germany
Mother's Birthplace: Germany
Mother of how many children: 1
Relationship to Head of Household: Head
Household Role Sex Age Birthplace
Bernardina Uhling Head F 49 Ohio
Edward Lindeman Boarder M 29 Kentucky
Citing this Record
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MM8F-QQT : accessed 1 May 2020), Edward Lindeman in household of Bernardina Uhling, Precinct I Cincinnati City Ward 23, Hamilton, Ohio, United States; citing enumeration district (ED) 198, sheet 10B, family 227, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,279.
