I can trace back to David Jr. and Samuel. Here are the tracks with #'s from the family trace work done in 1964.

2-4(4) DAVID b. Dec. 20, 1651 d. c. Aug. 1691 married Apr. 4, 1675 at NYC Rachel Cresson

3-21 BENJAMIN b. c. 1691, m. Nov. 7, 1713 at Hackensack Elizabeth DeGroot

4-78 DAVID bp. Dec. 4, 1720 d. Nov. 1795 m. Jan. 22, 1743 at Hackensack Marrityn Ackerman

5-180 (342) PETRUS D. born May 13, 1761 died June (July) 16, 1832 married (6-98) Sara Demarest

6-366 (776) DAVID P. born September 26, 1783 died January 13, 1849 Bklyn, New York married October 6, 1807 prob. at Broadalbin (6-349) Elizabeth Demorest

7-670 (1459) EARL ORVILLE born March 24, 1817 married May 20, 1838 at Red Hook New York Anna Maria Ackert

8-953 (2272) WILLIAM FRANCIS born February 28, 1845 died November 10, 1920 Fonda New York married (1) Ida E. Savage (2) May 24, 1882 at Broadalbin New York Margaret Rutt (Root)of Fonda, NY

9-1291 (3143) FRANK LESTER born July 23, 1879 died April 4, 1946 married February 8, 1902 Louisa Kirpens

10-1118 HAROLD LESTER born November 2, 1906 died July 14, 1953 Schenectady New York buried Scotia Bapt. Cemetery married August 14, 1926 Katherine Thackeray

11-800 ROBERT EMMETT born March 31, 1934 (died 17 Jan 1972 while on active duty in the US Navy, buried at the Long Island National Cemetery) married January 7, 1956 in Colorado Harriette J. Lakin

12-379 ROBERT EMMETT JR. born September 11, 1959 Rome, NY

If you look close, you'll see that there were two family to family couples. One is Petrus to Sara Demarest (Uncle), seven generations ago, Sara leads back to Samuel and the other is David P. and Elizabeth Demorest (cousins) six generations ago, Elizabeth leads back to David Jr. Now, here is the track from Samuel.

2-5 SAMUEL desMarets born Aug. 5, 1656, died 1728, married Aug. 11, 1678 at Bergen, Maria deRuine

3-26 SAMUEL DEMAREST b. c.1693 married Aug. 16, 1713 at Hackensack Lutheran Meeting to Annatie VanHoorn. Daughter 4-102 Elsie bp. Mar. 24, 1728 Schr.

5-47 NICLAES DEMAREST born January 17, 1724 married (1) Johanna Nagle of Tappan. He married (2) July 10, 1748 at Schraalenburg (4-102) Elsie Demarest, Note: Another Family link...

6-98 SARA DEMAREST born June 17, 1760 married * (5-180) Petrus Demarest

Then you can see the other string to get to me at 12-379.

You have to love a tight family, but I suppose it may have been more common in the small communities back in the 1700's.