George Owen Harry was one of the three children of Owen Harry who married three of the children of Thomas Lucas, The Hills, Reynoldston, Gower, which suggests a very strong association with that area. George Owen Harry says himself in the genealogy which he gave Lewys Dwnn in 1597 (Dwnn, Heraldic Visitations, i, 32-3) that his ancestors came, for the most part, from Llanelli, though his mother was the daughter of a man from Gower, married to a member of the Crump family whose home was in Sanctuary, Pen-rhys. In Gower it was believed that George Owen Harry was a native of the area, rather than of Carmarthenshire. In his description of Reynoldston for Edward Lhuyd in the 1690s (F.V. Emery, Trans. Cymm., 1965, 103) Isaac Hamon says: ‘In this parish Sr. Geo: Owen clerke, was born, called by some, George Owen Harry, he was the third son of Owen Harry Owen a freeholder of this parish’. In the genealogical MS. NLW Castell Gorfod 8, f. 141, c. 1700, containing notes gathered, perhaps, by Isaac Hamon, George Owen Harry is given as the 3rd son of Owen Harry of Reynoldston. It is likely that Isaac Hamon was well acquainted with George Owen Harry's grandson, John Owen, vicar of Pennard in Gower, who died in 1690. The genealogy in Castell Gorfod MS. 8 is probably based on William Bennett, Pen-rhys Castle's, book of genealogies which he compiled about 1630. The MS. is in the Royal Institution of South Wales (see the index to Bennett's book by G. Grant Francis, pp. 158, 188, 189). Here George Owen Harry is the fourth son of Owen Harry of Reynoldston and the two genealogies take the line back to Morris de Novo Castro or Morris Castell of Llanelli in the time of Edward II and naturally confirm that the three children of Owen Harry married the children of Thomas Lucas of Reynoldston.

These genealogies cannot be made consistent with that in Lewys Dwnn's book, but William Bennett's evidence cannot be totally disregarded since he lived in the same period as George Owen Harry, within a stone's throw of Reynoldston.