The following data is extracted from Alstead, Cheshire County, New Hampshire History.
John Slade, of Irish descent, came from Enfield, Conn., to this town in the autumn of 1773. He married widow Leason, of Enfield, Conn., by whom he had five sons and two daughters. His sons were John, William, Thomas, Daniel, and Samuel. John, Jr., moved- to Brookfield, Vt. Lieut. William Slade married Anna Root, of Windsor, Conn., by whom he had five sons and three daughters. Samuel married Hannah Thompson, by whom he had three sons and five daughters.
Source: Alstead, Cheshire County, New Hampshire History