1870 Census
Ferguson     William         35  Male    Cana   IA      Allamakee Franklin Twp
Ferguson     John            57  Male    Ny     IA      Allamakee Post Twp
Ferguson     Brad            27  Male    Pa     IA      Allamakee Union Prairie Twp
Ferguson     Lewis           50  Male    Norw   IA      Allamakee Union Prairie Twp
1900 Census
Fergurson       Harold           24  Male    Mn      IA      Allamakee 3-Wd Lansing
Fergusson       Eugene           30  Male    Ia      IA      Allamakee Jefferson twp
Ferguson        George           40  Male    Ia      IA      Allamakee Linton Twp
1910 Census
Ferguson        George C         48  Male    Ia      IA      Allamakee Linton Twp
1920 Census
Ferguson        Robert A         26  Male    Ia      IA      Allamakee Franklin
Ferguson        George C         59  Male    Ia      IA      Allamakee Linton