| Sources  | 
- [S19]  1900 US Federal Census, (www.ancestry.com).
 
Name: Carl Hartzog Home in 1900: Carroll, Cambria, Pennsylvania Age: 2 Estimated birth year: abt 1898 Birthplace: Pennsylvania Relationship to head-of-house: Son Father's name: Philip A Mother's name: Mary A Race: White 
 
  
- [S30]  1910 US Federal Census, (www.ancestry.com).
 
Name: Carl Herzog Age in 1910: 12 Estimated birth year: abt 1898 Birthplace: Pennsylvania Relation to Head of House: Son Father's name: Philip Father's Birth Place: Pennsylvania Mother's name: Mary Mother's Birth Place: Pennsylvania Home in 1910: Carrolltown, Cambria, Pennsylvania Marital Status: Single Race: Mulatto Gender: Male 
  
  |