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In page Margaret of Hereford:

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Margaret was born in about 1122/1123, the eldest child of Miles de Gloucester, 1st Earl of Hereford and Sibyl de Neufmarché, heiress to one of the most substantial fiefs in the Welsh Marches.[citation needed] She had five younger brothers and two sisters. These were: Roger Fitzmiles, 2nd Earl of Hereford, Walter de Hereford, Henry Fitzmiles, Mahel de Hereford, William de Hereford, Bertha of Hereford, and Lucy of Hereford. The Historia fundationis cum fundatoris genealogia of Abergavenny Priory named Margaretam, Bertram and Luciam as the three daughters of Miles and Sibyl.[citation needed]