I'm the last living Jacocks in the Wm. Benjamin Jacocks Line and have gone back to Benjamin Jacocks b abt. 1815 in Dutchess Cty.and d. l-20-1859 in N.YC. He was m. 6-18-1851 to Henrietta Vonck (this was his 2nd marriage)Benjamin's parents moved to NYC when Benjamin was about 10yrs. I also believe that I can connect to that William Jacocks of Hempstead.I'm trying to find Benjamin's parents, brother's and sisters and his first wife's name. I have the Jacocks family plot at Greenwood Cemetery in Brooklyn, N.Y. which have about 150 Jacocks relatives buried their.