Sibyl de Neufmarché great-granddaughter of Gruffydd ap Llywelyn, king of Wales (1100–1143) Parents Nest ferch Osbern Bernard de Neufmarché Children Bertha of Hereford Margaret of Hereford Roger Fitzmiles, 2nd Earl of Hereford Lucy of Hereford Walter de Hereford Mahel de Hereford William de Hereford Henry FitzMiles Partners Miles of Gloucester, 1st Earl of Hereford