Surname Saturday - Gray

The surname I’m sharing with you today comes from my father’s side. Cornelia Josephine Gray, she married Charles Harenberg. Cornelia died in 1890 after giving birth to my great grandmother, Emma Josephine Harenberg, in Missouri. I’ve run into a very large wall with Cornelia Josephine Gray, she showed up on a 1880 census, age 14, mulatto and a servant to the Ellis family, John C. Ellis of  South River, Marion, Missouri. I’m unable to locate anything about her childhood, who her parents are and where she came from. Special note is that she only shows up on the 1880 census.