He married Nov 1737 Flatlands, LI, Janetje Williamse van Couwenhoven (b. Flatlands, LI, 6 Oct 1714, d. Holmdel, NJ 14 Feb 1792). They had four sons and six daughters.

The second Garret Schenck was born August 30, 1712, but did not live to see old age, as he deceased at the age of forty-five, August 20, 1757. Married, in 1737, Jane, daughter of William Couwenhoven of Long Island. He remained on his iather's homestead in Pleasant Valley; had three sons—William, John and Garret—and seven daughters.