SW PA - Wm & Elizabeth Masters' 12 kids

Have compiled the following thus far: In Franklink Twp., WESTMORELAND CO., PA, William Masters of England and Elizabeth (unknown) of PA married ca 1814 and had the following children (birth years provided if known):
Sarah b. ca 1821 married 1841 Wm. Kistler; Mary m.? Taylor, Winifred (named after grandmother Masters) m. ? Conner, Isaac or Isiah b. ca 1822, Catharine m. ? Beighley, Obadiah b. ca 1825-30, Josiah b. ca 1814, William b. ca 1828, Leah b. ca 1833, Marjory/Margaret b. 1835, Elizah & John b ca 1841. Wm. died in 1853 and the will implies that Margaret & Eliza were possibly under 21 at that time.