The following data is extracted from Genealogy and Biography of Ontario County, New York.
William R. Marks, who has for many years been connected with the commercial interests of Yates and Ontario counties, New York, and has held numerous public offices, is descended from the early settlers in Connecticut.
(I) William Marks, grandfather of William R. Marks, was born in Burlington, Connecticut. He was an influential member of the community in which he lived. Served as a member of the legislature of Connecticut, both houses; was a justice of the peace for a period of forty years; and was prominently identified with church and Masonic affairs. He married Polly Roberts, of Burlington.
Source: Genealogy and Biography of Ontario County, New York