Vasily Bartold, also known as Wilhelm Barthold (1869–1930), a Turcologist and historian of Central Asia
In 1936 Barthold married Ruth Grünwald, a dancer at the Metropolitan Opera who had been just one year in the United States.
Lothrop's daughter, Emily Anne "Nan" Lothrop (1860–1927), married Baron Barthold Theodorevitch von Hoyningen-Huene (1859–1942), a Baltic nobleman and military officer, and their son was the noted fashion photographer George Hoyningen-Huene.