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

JULIANA du Perche (-after 1132). She is named and her parentage given in Orderic Vitalis, who also names her husband[2369]. 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"[2370]. "Rotrocus comes Perticensium" donated property to the abbey of Sainte-Trinité de Tiron by charter dated [1119] subscribed by "Juliane soror mea, Richerii filius eius"[2371]. "Juliane soror mea" witnessed the charter dated [1120] under which "Perticensis comes Rotrocus" donated property to the abbey of Sainte-Trinité de Tiron[2372]. "Domine Juliane" recognised rights of Saint-Denis de Nogent by charter dated to [1122/33], specifying that she was governing Perche while the count was absent in Spain, witnessed by "Gislebertus puer filius prefate Juliane"[2373]. m GILBERT Seigneur de Laigle, son of RICHER de Laigle & his wife Judith d'Avranches (-[1118]).

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