Barbara Rawdon-Hastings, Marchioness of Hastings, 20th Baroness Grey de Ruthyn (née Yelverton; 20 May 1810 – 18 November 1858) was a fossil collector and geological author.

The palaeontologist and anatomist Professor Richard Owen wrote of the thousands of fossils previously in her private museum at Efford House, among them "some of the finest in the world".

Lady Hastings associated with many eminent scientists during her lifetime, including Edward Forbes, Charles Lyell, Alexander Falconer, William Buckland and Richard Owen.

[2] In 1847, Lady Hastings presented her paper to the Oxford meeting of the British Association for the Advancement of Science, exhibiting two crocodile skulls and the shell of a turtle from Hordle Cliff.

[2] Immediately after Richard Owen explained that the remains from Hordle suggested "a new genus of Pachyderm", which he named Paloplotherium, falling between Palaeotherium and Anoplotherium, during his presentation of the same fossils.