Source : Webster's Revised Unabridged Dictionary (1913)

Vestryman \Ves"try*man\, n.; pl. {Vestrymen}.
   A member of a vestry; especially (Prot. Epis. Ch.), a member
   other than a warden. See {Vestry}.

Source : WordNet®

vestryman
     n : a man who is a member of a church vestry