The Collaborative International Dictionary of English v.0.48:

Forbear \For*bear"\ (f[o^]r*b[^a]r"), n. [See Fore, and Bear
   to produce.]
   An ancestor; a forefather; -- usually in the plural. [Scot.]
   [Also spelled forebear.] "Your forbears of old." --Sir W.
   Scott.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Forebear \Fore*bear"\, n.
   An ancestor. See Forbear.
   [1913 Webster]

WordNet (r) 3.0 (2006):

forebear
    n 1: a person from whom you are descended [syn: forebear,
         forbear]