Barbara,
I'm not researching your family. However, I have had to look at Oldcastle ( and surrounds) for my own family for several years. In 1827, John McBride is recorded as living in Goles and Mayo ( perhaps an earlier variation of your Golashane) on 9.5 acres. The entire townland was actually less than 50 acres and there were only eight tenancies. Significantly, his joint tenancy was shared with a Thomas Cahill. Not sure if this is worth anything to you, but it is yours anyway,