Place names change over time as the boundaries and jurisdictions are modified. Genealogists should use the place name as it existed at the time of the event. For example, the location of a family living in the same house in Preston for 40 years could be recorded at different times as: Preston, Oneida, Idaho Territory, United States (1880) Preston, Oneida, Idaho, United States (1900) Preston, Franklin, Idaho, United States (1920) Idaho county map, 1900                  ...