Source : Webster's Revised Unabridged Dictionary (1913)

Misbegot \Mis`be*got"\, Misbegotten \Mis`be*got"ten\, p. a.
   Unlawfully or irregularly begotten; of bad origin;
   pernicious. ``Valor misbegot.'' --Shak.

Source : WordNet®

misbegot
     adj : born out of wedlock; "the dominions of both rulers passed
           away to their spurious or doubtful offspring"-
           E.A.Freeman [syn: {bastard}, {bastardly}, {misbegotten},
            {spurious}]