[3][4] His paternal grandparents were Catalina (née de Boogh) Beekman and Wilhelmus Beekman, who served as the governor of the Colony of Swedes and acting mayor of New York City from 1682 to 1683 under Governor Anthony Brockholls.
[2] His uncle Gerardus Beekman was elected president of the council and acting governor of the Province of New York in 1710.
One in the area of Rhinebeck, New York and the other, called the "Back Lots" or Beekman Patent, in the south east corner of Dutchess County.
Gertrude was a daughter of Stephanus Van Cortlandt, the 10th and 17th Mayor of New York City.
Senator and U.S. Secretary of State who married Mary McEvers, the sister of Auguste Davezac.