My Great Grandmother was Sophia Jane Copeman - born 1876 in Bracon Ash, Norfolk, England. Her Parent were Walter and Sarah (nee Staff). Walter Copeman was born circa 1847 in Wreningham, Norfolk. Walter's parents were Thomas and Mary (nee Howes) both born circa 1809 in Wreningham.
Does any of this match your wife's Copeman Family?