Professional genealogists benefit from discovering double census enumerations because it provides more incite into the family unit by way of others with whom they associated. Double census enumerations are where a single person is found twice in a given census year. We recently completed a genealogy research project where we found a double census enumeration and it provided us with key information about the other family members. In our case we found a family’s daughter living with her parents but then also found her living with what turned out to be extended family members. This opened up a new avenue that led to further genealogy discoveries!