“…there is extensive archeological evidence of a much older Hebrew alphabet, called Gezer or Sinatic (after Mount Sinai), as the original and most ancient Hebrew.
Sinatic Hebrew is in fact the oldest known alphabet, suddenly appearing about the time of Abraham (circa 1850 BCE). The original Sinatic Hebrew became virtually extinct after the decimation of Lachish circa 701 BCE.
The Sinatic alphabet could have evolved as an alphabetic representation of the twenty-six Sumerian cuneiform ciphers, the world’s oldest known non-alphabetic language.”
–Daniel Feldman, Qabala: The Mystical Heritage of the Children of Abraham, 2001, pg. 56.