GUY [III] de Laval, son of GUY [II] Sire de Laval & his second wife Cécile --- (-[1130/42], bur Marmoutier). A charter dated to [1093/1110] records that "Guido filius Hamonis…et eius uxor Sicilia, filiusque eius…Guido" donated property to Marmoutier when "fratrem suum Hugonem" appeared to be dying, and a later donation by "Guido filius eius et Secilia uxor illius et Hugo frater illius"[472]. "Guido…et Cecilia uxor eius…et filius eorum Guido…Gervasiusque alius filius" donated property to the monastery of La Charité Sainte-Marie d´Anjou, with the approval of "Hugo de Lavalle", by undated charter witnessed by "…Adelardus de Castro Gunterii, Hugo de Cretone, Hugo de Mathefelone…"[473]. He succeeded his father as Sire de Laval. The Gesta Consulum Andegavorum records that "dominus…Lavallensis" participated in "la journée de Séez" 11 Dec 1118 when the supporters of Foulques V Comte d´Anjou captured Alençon from Henry I King of England[474]. An undated charter, dated to the early 12th century, under which the nuns of Ronceray confirmed an agreement, is witnessed by "Hugues de Laval, qui nunc dominium tenebat"[475], which suggests that Hugues [II] de Laval (see above) acted as regent during the minority of Guy [III]. A charter dated 1142 confirms the foundation of the priory of Plessis-Milcent by "Guido de Lavalle" and completed after his death by "filius eius Guido", with the consent of "matre sua Ama et Gervasio avunculo suo"[476].
m ([1118/23]) EMMA, daughter of --- (-after [1153/62]). Broussillon refers to an assertion that a tomb in Clermont abbey recorded the burial of "Emma Anglorum regis filia dominaque Lavallensis" but adds that he found no document which confirms that this is correct[477]. "Guy de Laval" founded the abbey of Clermont, with the consent of "Emma sa mère, d´Hamon son frère, alors malade", by charter dated 1152[478]. "Guido Lavallensis dominus" donated property to Savigny by charter dated to [1153/62], witnessed by "…domina Emma matre mea…"[479].
Guy [III] & his wife had [three] children