From http://fmg.ac/Projects/MedLands/NORMAN%20NOBILITY.htm#RotrouIdied1144B

MARGUERITE du Perche (-27 Aug after 1156).  She is named and her parentage given in Orderic Vitalis, who also names her husband and, in a later passage, her father and two older sons[2364].  The Genealogiæ Scriptoris Fusniacensis names " Rotaldum eiusdem loci comitem et Iulainam de Aquila matrem regine Navarrensis, et Margaretam uxorem Gisleberti de Novo-burgo" as children, incorrectly, of "Rotaldo comiti de Pertica" & his wife Beatrix de Roucy, specifying that Marguerite had children "Rotaldum Ebrodiensem episcopum cum aliis liberis utriusque sexus"[2365].  “Henricus…Warwicense consul et Margareta uxor mea et Rogerus noster filius” donated property to Warwick St Mary by undated charter[2366].  The 1130 Pipe Roll records "comitisse de Warwic" in Wiltshire[2367].  1156.  The necrology of the church of Evreux records the death "27 Aug" of "Margarita mater Rotrodi episcopi"[2368].  m HENRI de Beaumont Earl of Warwick, son of ROGER Seigneur de Beaumont-le-Roger & his wife Adeline de Meulan ([1048]-[20 Jun] 1119, bur Préaux).  

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http://www.thepeerage.com/p36859.htm#i368589

Margaret de Perche1

F, #368589

Last Edited=12 Jun 2009

    Margaret de Perche is the daughter of Geoffrey II de Perche, Comte de Perche et Mortagne.1 She married Henry de Newburgh, 1st Earl of Warwick, son of Roger de Beaumont, Seigneur de Portaudemer and Adeline de Meulan.1

Child of Margaret de Perche and Henry de Newburgh, 1st Earl of Warwick

Roger de Newburgh, 2nd Earl of Warwick+1 d. 12 Jun 1153

Citations

[S22] Sir Bernard Burke, C.B. LL.D., A Genealogical History of the Dormant, Abeyant, Forfeited, and Extinct Peerages of the British Empire, new edition (1883; reprint, Baltimore, Maryland: Genealogical Publishing Company, 1978), page 399. Hereinafter cited as Burkes Extinct Peerage.