Van Dyke
His grandson, Gerardus Christopher Beekman (died 1778), married Catharine Van Dyke (born 1708), the daughter of John Van Dyke, granddaughter of Jan Janse Van Dyke, and great-granddaughter of Jan Thomasse Van Dyke, who came from Amsterdam in 1652 and is considered to be the progenitor of the Van Dyke family in America.