Constance of Penthièvre
| Constance of Penthièvre | |
|---|---|
| Tenure | Viscountess consort of Rohan |
| Born | c. 1140 |
| Died | after 1184 |
| Spouse | Alan III, Viscount of Rohan |
| Issue |
Alan IV William Josselin Margaret Alix Constance |
| House | Penthièvre |
| Father | Alan of Penthièvre |
| Mother | Bertha, Duchess of Brittany |
Constance of Penthièvre (c. 1140 – after 23 June 1184) was a Breton princess, daughter of Alan of Penthièvre, 1st Earl of Richmond, and Bertha of Cornouaille.
Constance was the daughter of Bertha, daughter of Conan III, Duke of Brittany and Matilda FitzRoy, and of d’Alan the Black, Earl of Richmond, younger son of Stephen of Penthièvre and Havoise of Guingamp. She was the sister of Duke Conan IV of Brittany and Enoguen, Abbess of Saint-Sulpice.
On 15 September 1146, her father died and two years later her mother married Odo, Viscount of Porhoët, who became regent of Brittany during Conan IV’s minority.
According to some genealogies, Constance married firstly William FitzEmpress, a.k.a. “Tournemine”, third son of Geoffrey V, Count of Anjou and Empress Matilda, and younger brother of King Henry II of England and Geoffrey, Count of Nantes. William was the founder of the House of Tournemine. However, there is no evidence for this marriage, and no evidence of William Tournemine’s identity either
Constance married secondly Alan III, Viscount of Rohan, and founded the Abbaye Notre-Dame de Bon-Repos with him on 23 June 1184.
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