This source suggests that there was an additional son, John:
"His sons John, Reuben and Levi were in the war of 1812, and in Indian wars of Kentucky and Indiana. John, I think, my mother's youngest brother was at Hull's surrender but escaped....
".....Uncle John's boys mostly, died early.
".....Uncle John and Uncle Reuben were soldiers in the war of 1812."
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"As previously stated, my grandfather Westfall was married in Taggerts Valley, in 1777, to Mary King, and removed to Kentucky in 1792, there my mother, Janet, was born near Beardstoan, in Boone Co., Ky., Aug. 13, 1779. She was the youngest of the family. She had brothers, Cornelius, John, Levi, Reuben and sisters, Anna Anderson, Elizabeth Swank, Polly (Mary) King, afterwards Tibberghin, all of whom had children in numbers that would have delighted President Roosevelt."
