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Pierre I "Mauclerc" (1187-end of May 1250), Duke of Brittany


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Same as
Additional names
Pierre de Braine1from 1237
Parents
Father:2
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Robert II de Dreux (1153-28 December 1218), Comte de Dreux
Mother:3Yolande de Coucy (1164-18 March 1222)
Spouses and relationship events
Married:4between March 1213 and October 1214Alix de Thouars (1200-21 October 1221), Dss of Brittany
Betrothed:5before 21 July 1229Marie de Lusignan (before 1215-around 1252)
The marriage was prohibited because of their relationship in the 4th degree. It's not certain which daghter of Hugues of Cyprus was betrothed to the duke of Brittany, but it's assumed it was the older one of the sisters, Marie.
Married:6probably 1230Nicole (-February 1232)
Married:7before January 1236Marguerite de Montaigu (around 1189-after 27 November 1241), Dame de Montaigu et de La Garnache
Children
Children with Alix de Thouars:
Jean I "le Roux" (1217-8 October 1286), Duke of Brittany8
Yolande de Bretagne (end of 1218-10 October 1272)9
Arthur de Bretagne (1220-shortly after 1223)10
Children with Nicole:
Olivier (I) de Braine dit de Machecoul (around 1231/32-1279)11
Attributes
Occupation:12from 1214Comte de Penthièvre
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