My GGG-Grandfather's will mentions his grandchildren, Eva and Belle Libby. Trying to figure out who their parents were. Will was written in 1882 in Benton Co., Iowa.

Warren Elliott (1813-1882)

"In case the said Mary Jane Rampton shall be dead at the decease of my said wife, I give and devise the above described real estate to my grandchildren Eva Libby, Belle Libby, Frank W. Rampton, Mary L. Rampton and Charles H. Rampton to be divided equally between them share and share alike."

Charles H Rampton is my great-grandfather in my maternal line.

Would appreciate any clues!