- Guy VI de Laval known as Guyonnet de Laval (died 1211)
- Ozanne, mentioned in a charter of Réau Abbey, cited by Charles Maucourt de Bourjolly
- Emma de Laval (about 1200 - 27 April 1264) who inherited the title in 1211 on the death of her brother Guyonnet. Married Robert Ier d'Alençon (died 1217), Mathieu II de Montmorency (died 1230) and Jean de Choisy et de Toucy.
- Isabeau (Isabelle) de Laval (died 1244) who married Bouchard VI de Montmorency.
In the charters originating from him and in those which he countersigned, he called himself the fifth Lord of Laval of his name, not the seventh, as Blondel wrote, nor the fourth, as seen by Père Anselme: 8Ego Guido quintus, dominus de Lavalle.
Complaints about his harassment of the Abbey of Marmoutier and the domains it possessed in the district of Laval were referred to Pope Eugene III. On Guy's refusal to make good the damage done, the pontiff ordered Guillaume Passavant, Bishop of Mans, to excommunicate him and to ban his land; an act exercised in 1150. Guy, having had the censures lifted in 1152, founded Clermont Abbey in the same year, in conjunction with his mother and wife, for men of the Order of Cîteaux, and granted it a thousand arpents in pasture, arable land, and woodland.
Henry, his brother-in-law, duke of Normandy and of Aquitaine, and Count of Anjou and Maine, came to the throne of England in 1154 and named him Regent and Lieutenant-General of the provinces of Anjou and Maine. In 1170 he founded, in the chapel of his castle, twelve prebends, and had this confirmed by the bishop Guillaume; subsequently ratified in 1185 by Pope Lucius III. In 1208 this chapter was transferred to Saint Tugal de Laval, and augmented by six prebends.
No ancient monument remains to indicate the year of death of Count Guy V.
Notes and references
Guy V de LavalDied: 1210
Guy IV de Laval
| Lord of Laval
Guy VI de Laval
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