begetter

from WordNet (r) 3.0 (2006)

begetter
    n 1: a male parent (also used as a term of address to your
         father); "his father was born in Atlanta" [syn: {father},
         {male parent}, {begetter}] [ant: {female parent}, {mother}]

from The Collaborative International Dictionary of English v.0.48

Begetter \Be*get"ter\, n.
   One who begets; a father.
   [1913 Webster]