The following data is extracted from Genealogy and Biography of Ontario County, New York.
Judge Robert F. Thompson, a prominent lawyer and jurist of Ontario county, New York, comes of forbears who were not only of high character but of lofty position. His father and three brothers served in the civil war; his grandfather and his three brothers in the war of 1812; and his great-grandfather and great-great-grandfather in the revolution.
(I) Hugh Thompson, the emigrant ancestor of this family, was of Scotch-Irish stock, and came from Londonderry, Ireland. in the eighteenth century, settling in Derryfield (now (1910) Manchester), New Hampshire.
Source: Genealogy and Biography of Ontario County, New York