This pair of tombs resemble the Bara Khan and Chhota Khan tombs, and are good examples of the tomb architecture of the period. The names, Dadi-ka Gunbad and the Poti-ka Gunbad, or Grandmother and Granddaughter, are of popular origin; nothing is known about the owners or builders of the tombs.
Sources:
Williams, John A. and Caroline. 1980. Architecture of Muslim India. Set 3: The Sayyids and the Lodis 1414-1526. Santa Barbara, California: Visual Education, Inc.