Mary Cota on 1880 census
This isn't my family, but while researching George Warren, I found this listing in Eagle Point, Chippewa, Wisconsin:
George P. Warren, 57, Indian Agent, born Wisconsin, father born Vermont, mother born Wisconsin;Rosella, wife, 59, born Wisconsin, father born Minnasota, mother born Minnasota;Lewis Chevallie, 10, adopted, born Wisconsin, father born Canada, mother born Wisconsin;Alexander Chevallie, 12, adopted, born Wisconsin, father born Canada, mother born Wisconsin;and Mary Cota, 5, ward, born Wisconsin, father born Canada, mother born Wisconsin.Hope this helps someone.