He was the son of William Pentecost and Dora Fryer. As far as I know George W. and his second wife, Sarah, only had one son together, Robert T. Pentecost b 23 Nov 1881 d 27 Dec 1909, also buried in Coila Cemetery. Sarah had another son, Lafayette Ames, by her first husband.
Are you related to James? If you are, I'd love to know the connection. You can contact me by email if you prefer.
George W. and his first wife, Susanah Ward, were my ggparents.