Son of Joseph Sixbury and Malinda Ellwood. Married Jennie Ainley on Apr. 11, 1866 in Sycamore, Illinois. Father of 10 known children: Joseph, Nellie, Mary Eliza Brooks, Katie, Fred, Julia Truman Sixbury Gibbons, John, George, Cora, and Aljean (Allie) Sixbury.

Chauncey served in the Civil War, and mustered out June 7, 1865, as a Sergeant.
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From the Feb. 1930 issue of the Sycamore True Republican:

The Sixbury family were prominently identified with the history of this county in its formative period were prominent here for two generations...

Chauncey Sixbury, a large, robust, hearty man, a veteran of the Civil War, for many years conducted a farm northeast of Sycamore in the Charted Grove neighborhood, and everybody hereabout was acquainted with him. He moved with his large family to Boone county, Iowa, in 1882, and there remained until his death.

Chauncey Sixbury's father was Joseph Sixbury, a native of Amsterdam, New York, who married Malinda Ellwood, whose six brothers were prominent in the early history of this county for many years later.

Joseph Sixbury and his wife, Malinda Ellwood-Sixbury, came to DeKalb county in 1837, the third year of the settlement of the county, when it was a wilderness. Although bands of Indians had been driven out some three years before, there remained many scattered families who made their temporary homes in the various groves, who were among the many disagreeable features with which the settlers were obliged to contend. From the surrounding groves the Indians made incursions into the settlement to beg food and other favors. In relating some of the habits of the aborigines, Mrs. Joseph Sixbury said that they would appear at the cabin doors of settlers and cast their blankets inside. If the occupants allowed the blankets to remain, the Indians considered it an invitation to come in and take their repose; but if the blankets were taken up and placed outside, the visitors accepted the act as a refusal to allow them to tarry, and picking up their blankets, they passed on. Soon after the arrival here of the Sixburys the Indians were all removed by the government to the vicinity of Council Bluffs.

Joe Sixbury and his wife were devout Methodists-of the kind that were called "shouting Methodists", and no one could be mistaken as to what their religious convictions were. Joseph Sixbury was a steward and was elected county treasurer for two successive terms. His grandson, Fred Sixbury, who died recently, is survived by children and a grandchild, the latter of the fourth generation of Sixburys, descendants of Joseph Sixbury who came here from Montgomery County New York.