"Early Germans of New Jersey", Theodore Frelinghuysen Chambers, 1895 Sylvester Alpock, m. (l) Clarissa Apgar; (2) Abbey Case. Sylvester Alpock son of: William G. Alpock, b. 1799, May 11; d. 1871, April 26; m. Sarah Shannon, nee Clover, dau. Sam'l; d. 1890, Aug. 17, at 90 years, 8 months, 5 days. William G. Alpock son of: GEORGE ALPOCK, b. 1778, Jan. 2; m. 1798, Jan. 20, Mary McDaniel; b. 1776; d. 1862, April.