The following data is extracted from Genealogy and Biography of Ontario County, New York.
John (2), son of Richard Carpenter, was a brother of John Carpenter, Jr., the famous town clerk of London, whose bequest to the city of certain funds was the foundation of the City of London school. It was a common practice to have two sons in the same family of the same name, even when both were living. The younger was called junior, sometimes Jenkin. John Sr. was one of the executors of John Jr.'s will and was mentioned in his will as well as another brother, Robert, who was given "one of those two silver cups with a lid which Thomas Knolle gave me."
Source: Genealogy and Biography of Ontario County, New York