I have a Smyth in my family tree. She was Jane Smith from Teeshan near Ballymena who married my ggg grandfather James Ross. I did notice that there were quite a few Smiths in the Teeshan area when I searched Griffiths Valuation. Their names were spelt both ways. There was a John and a James and a Jane Smyth in Teeshan (Parish of Craigs) and a William and a James in the townland of Craigs (Parish of Craigs).