Hi Lilac Lilly.
Were your ancestors Catholic, Church of Ireland or Presbyterian?
I live near Old Ross so I can tell you that there is St. Marys Church of Ireland there, the cemetery contains both catholic & church of Ireland burials,. For catholic burials in St. marys C.Of I cemetery contact Rev. F.Murphy, St. Marys Church, Cushenstown, Foulksmills, Co. Wexford. ( St. Marys Church in Cushenstown is about 2 miles from Old Ross but it was the burial place of most people living in the locality. My husbands grandparents are buried there.)
If they were Church of Ireland, contact the Reverened L. Rogers, The Rectory, College Road ,New Ross,Co. Wexford.
As regards Horetown, if protestant please contact the rector, St. Iberius Church of Ireland, Wexford. Horetown is in the Wexford Union of Parishes.
If catholic , please contact the Parish priest in Taghmon, Co. Wexford. I don't know his name but if you google
www.ferns.ie this will give you the list of Catholic churches in the Wexford area and also who the parish priests are.
Also have you their civil marriage certs? this should give you the name of the church the marriage took place and also whether it was catholic or protestant.
Hope this helps,
Good luck with your research.
Summerhill