VOLUME ONE
https://archive.org/details/ovidsmetamorphos01ovid/mode/2up?view=theater
this is the crude rip-off version printed in Dublin ...
and this is the original ... printed in London ...
... and here is the painted lady ...
in 1727, the duchess of kingston was Isabella Bentinck
portraits are hard to find but this is a tentative ID ...
... and this is a more positive ID ...
lady mary ker, duchess of roxburghe
possibly lady henrietta pelham holles
https://en.wikipedia.org/wiki/Harriet_Pelham-Holles,_Duchess_of_Newcastle
https://en.wikipedia.org/wiki/Frances_Seymour,_Duchess_of_Somerset_(born_1699)
https://en.wikipedia.org/wiki/Charlotte_Rich,_Countess_of_Warwick
https://en.wikipedia.org/wiki/Anne,_Princess_Royal_and_Princess_of_Orange
https://en.wikipedia.org/wiki/Mary_Cowper
VOLUME TWO
https://archive.org/details/ovidsmetamorphos02ovid_0/mode/2up?view=theater
Lucy Manners, nee Sherard, Duchess of Rutland
https://en.wikipedia.org/wiki/Lucy_Manners,_Duchess_of_Rutland
lucy pelham holles, countess of lincoln
Frances Digby, Viscountess Scudamore
i am assuming that MRS walpole was really LADY walpole ...
margaret pelham
https://en.wikipedia.org/wiki/Dorothy_Boyle,_Countess_of_Burlington
Juliana Boyle, Countess of Ailesbury
diana de vere, duchess of saint albans
The two rip-off volumes are kept in the Clark Institute Library
https://www.clarkart.edu/library/about-the-library
Ref:
Tonson's 1717 first edition has been scanned in for Google Books so that you can read it all for free