The only sibling of Mary Hoyt, mother of W.T. Sherman, which I have recorded was Charles, who supposedly had a mental affliction passed on to him by his mother, Mary Raymond. I do have the Hoyt ancestry of this line back to the immigrant, Simon Hoyt.
This should interest you - it is excerpts from a book which I recorded in my notes for Mary Hoyt:
FROM: "The White Tecumseh" by Stanley P. Hirshson
Page 2: "Then, on May 8, he [Charles Sherman - father of William] married Mary Hoyt, whom he had known in Norwalk since childhood. Mary was nine months his senior.
The Hoyts, too, were an old family, going back in America seven generations and being among the first settlers of Norwalk. During the Revolutionary War the sons of the family split their allegiance, half supporting the king and half favoring the rebels. One son, Jesse, even accompanied the British through Norwalk, pointing out the patriot homes and churches that were to be burned. After the war, he wisely migrated to Nova Scotia.
The Shermans tended to be lawyers, the Hoyts merchants. Early in life, Isaac Hoyt, Mary Sherman's father, followed the usual occupation, but severe asthma forced him to seek a cure at sea. For twenty years he was the captain of a vessel. In 1804 he died at sea and was buried at Gibralter.
For a good reason neither John Sherman nor his brother ever publicly mentioned Isaac Hoyt's wife, their maternal grandmother, Mary Raymond Hoyt. In 1928 a genealogist hired by General Sherman's son, P. Tecumseh Sherman, could find out nothing about her, noting simply that she died after 1804. A history of the Raymond family published in 1970 also recorded nothing.
Fortunately, however, a dedicated researcher, Francis F. Spies, has depositied in the Genealogy Room of the New York Public Library a typed copy of his unpublished three-volume study of tombstone inscriptions in Norwalk. It reveals that among those buried in the graveyard encircling St. Paul's Episcopal Church is Mary Raymond Hoyt, who died on October 1, 1828, at the age of seventy-three.
In later life, Mary Raymond Hoyt suffered mental incapacity. Although bured in Norwalk, she did not die there; the most educated guess is that she spent her last years in an asylum. Her exact illness will never be known, but she transmitted whatever she had to the youngest of her two sons, Charles Hoyt, a prosperous New York merchant. One of General Sherman's sons and perhaps John Sherman later seemed to have suffered from the affliction.
With each other, the Shermans several times discussed the malady. In 1860 Ellen Ewing Sherman, General Sherman's wife, mentioned Uncle Charles' stay in "the Asylum." Two years later she reminded her husband of "the melancholy and depression to which your family is subject," particularly "your Uncle and Grandmother."
I am a Hoyt descendant and have been researching the family. I have an interactive website through MSN, if you would be interested. Membership is free.http://groups.msn.com/AncestorChroniclesOurKinAndTheirTimes