Sir Richard de Grenville was one of the Twelve Knights of Glamorgan who served under Robert FitzHamon, in the conquest of Glamorgan in Wales. He obtained from FitzHamon the lordship of Neath in which
1860 imaginary stained-glass depiction of Richard de Grenville. Church of St James the Great, Kilkhampton, Cornwall.
1860 imaginary depiction of Richard de Grenville (right) and his elder brother Robert FitzHamon (died 1107) (left), St James Church, Kilkhampton