Gertrude Katherine Lathrop (December 24, 1896-March 16, 1986) was an American sculptor, known for her medallion work and sculptures of small animals.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Gertrude_K._Lathrop

Medals by Gertrude K. Lathrop

Gertrude K. Lathrop on Invaluable: https://www.invaluable.com/artist/lathrop-gertrude-katherine-wwigcmvhpg/sold-at-auction-prices/

Further reading:
https://brookgreen.pastperfectonline.com/bycreator?keyword=Lathrop%2C+Gertrude+Katherine
https://americanart.si.edu/artist/gertrude-k-lathrop-2814
https://www.albany.edu/arce/LathropXX.html