Count of Rennes

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The Count of Rennes was originally the ruler of the

• ???–876
  Gurwant
  , also Duke from 874
• 876–888 Judicael
• 888–896 Berengar II of Neustria
• 896–903 unknown
• 903–953 Judicael Berengar
• 958–992
  Conan I the Crooked
  , also Duke from 990
• 992–1008 Geoffrey I, also Duke
• 1008–1040 Alan I, also Duke; granted the Countship of Penthievre to his brother Eudes, thereby founding the Cadet Branch of the House of Rennes. Ruled with Odo, Count of Penthièvre until 1035.^{[citation needed]}
• 1040–1066 Conan II, also Duke
• 1066–1082 Geoffrey II Grenonat
• 1066–1072 Hawise (in opposition to Geoffrey II), also Duchess
• 1072–1084
  Hoel I
  (in opposition to Geoffrey II from 1066), also Duke from 1066
• 1084–1112 Alan II Fergant, also Duke
• 1112–1148 Conan III the Fat, also Duke
• 1148–1156
  Hoel II
• 1156–1166 Conan IV the Young, also Duke until 1166
• 1166–1181 Henry Curtmantle, as guardian of Constance
• 1181–1186 Geoffrey III, Count of Rennes and Duke of Brittany jure uxoris as Geoffrey II
• 1166–1201
  Constance
  , also Duchess from 1166
• 1196–1203 Arthur, also Duke

The County of Rennes was merged into the Ducal crown of Brittany, and subsequently the crown of France, through Constance's descendants.

• Comté de Rennes