41C3
Theron Sedgwick  [Elijah Sedgwick / Tryphena Parker]
b. July 30, 1799, Stephentown, Rensselaer, New York
d. July 29, 1883, Verona, Oneida, New York
bu Westmoreland, Oneida, New York, Lowell Cemetery
m. September 02, 1825, Philotheta Chamberlain

Philotheta Chamberlain  [parents unknown]
b. 1807, Monroe County, New York
d. November 16, 1885, Verona, Oneida, New York
bu Westmoreland, Oneida, New York, Lowell Cemetery

Census Records:

Children:

Son William Sedgwick died in service during the Civil War. He is listed on his parents' monument at Lowell Cemetery, Westmoreland, Oneida, New York. However, I found a listing that he is buried at Brashear City, Louisiana, so this marking at Oneida may be only a memorial.
Reference: Volume VII, Soldiers Buried in Brashear City, Louisiana, Page 83
Available here to GenealogyLibrary.com subscribers.
"58 Segwick, Wm Private 25th NY bat April 1, 1865"

More about Theron Sedgwick:

Obituary of Philotheta (Chamberlain) Sedgwick, printed in the ROMAN CITIZEN newspaper, Rome, Oneida County, New York, Friday, November 20, 1885

Sedgwick - At her residence in Verona, New York, November 16, 1885, Mrs. PHILOTHETA Sedgwick, relict of the late Theron Sedgwick, aged 78 years. (RCNov20/1885) (obit follows)

Mrs. Philotheta Sedgwick died at her home in Verona on Monday, November 16, 1885, aged 78 years. She had been rather frail for some years, but the illness of which she died was only of three days duration. Her eldest son, Mr. Edwin C. Sedgwick, who resides in Newark, New York, came down to visit his mother on Saturday, November 14, 1885, and she was able to go to the door and meet him, but even then the shadow of the death angel's wing was over her. She took to her bed the same day and continued to fail rapidly till her death, which occurred the following Monday. She was buried in Lowell cemetery Thursday (November 19, 1885). Funeral services being conducted at her late residence by her pastor, Rev. W.C. Taylor, of the Verona Presbyterian Church.

Deceased was a native of Monroe County, NY, where she resided till her marriage, at the age of 18, to her late husband, Theron Sedgwick, who died about two years ago. At that time Mr. Sedgwick occupied a farm in Westmoreland about a mile east of his last place of residence. There they continued to reside till about 1842, when they removed to the farm in Verona where both spent the remainder of their days, and which has been conducted for a number of years past by the youngest son, Mr. Allan Sedgwick. Some fifty-eight years they walked side by side in happy wedlock, and the tie which united them so long was only severed for a brief two years. They have met again on that beautiful shore where there shall be no more partings, and where they will enjoy each other's society through the cycles of a blissful immortality.

Seven children survive her, and while they mourn the loss of one so dear to them they realize that their loss is her eternal gain. The children are three sons and four daughters, viz: -- Edwin C., of Newark, NY; Alfred, of Riga, NY; Allan, of Verona, NY; Mrs. Jerusha Rouse, Glencoe, Minn.; Mrs. Emily Palmer, Churchville, NY; and Mrs. Emily Morton and Mrs. Frances Going, of Rome, NY. (RCNov20/1885)

Note: This gives us the married names of the four daughters.

1. The Sedgwick Collection (MSS B46) at the New Haven Colony Historical Society papers of Hubert Merrill Sedgwick, Francis Morris Sedgwick and Frederick J Sedgwick,
genealogists of the family of Robert Sedgwick (1613 - 1656)

2. Census records, any of those indicated.