WordNet (r) 3.0 (2006):

heth
    n 1: the 8th letter of the Hebrew alphabet

Easton's 1897 Bible Dictionary:

Heth
   dread, a descendant of Canaan, and the ancestor of the Hittites
   (Gen. 10:18; Deut. 7:1), who dwelt in the vicinity of Hebron
   (Gen. 23:3, 7). The Hittites were a Hamitic race. They are
   called "the sons of Heth" (Gen. 23:3, 5, 7, 10, 16, 18, 20).


Hitchcock's Bible Names Dictionary (late 1800's):

Heth, trembling; fear