I have the following info concerning the parents of your Katherine Dunkum I believe:the 1890 census is not available since it was burned and I have not checked the 1900 census to see if Katherine is listed.This is all I know about this family.
1870 census, Richmond, Va., Jefferson Ward Dunkum, Alfred, age 42, carpenter Mary C., age 22 Elizabeth, age 5; Frank, age 2 Tinsley, Ann, age 42, Black domestic servant. All b Va.
1880 census Richmond, Va. Dunkum, A. J., age 47, Husb?, carpenter M. C., age 33, wife Betty B., age 15, dtr, Frank W., age 12, son; Fannie M., age 8, dtr; Carrie L., age 5, dtr; Emily E., age 1, dtr. Haley, Joseph C., age 65, Husb?, teamster M. F., wife. All b Va.