Martha Hunt married a Weaver

In Gilmer County marriage index it says Martha Hunt wed B Weaver Aug 1874I assumed the B was a D and put her with Ansel Decatur Weaver.But everyone says he married Martha Thompson in 1870.
Martha is the eldest of Robert Rivers Hunt and Mary Banks family.Infact her birth date is before their wedding date.Is she theirs? Mary Banks child before she wed?His child by someone?Who is the B weaver martha married.I don't find them anywhere.who knows the answer to this mystery?