• General Notes

  Stephen, Count of Tréguier was son to Eudes, Count of Penthièvre and Agnes of Cornwall, sister of Hoel II, Duke of Brittany.
  
  The title of Earl of Richmond appears to have been in existence in England a considerable time before it was held in accordance with any strict legal principle. Alan Le Roux (c. 1040-1089), was a Norman relative of Geoffrey of Brittany. He took part in William the Conqueror's invasion of England, and Le Roux obtained grants of land in various parts of England, including manors formerly held by Earl Edwin in Yorkshire. He built the castle of Richmond in one of these.
  
  His brother Alan Le Noir, or Niger, (c. 1045-1093), succeeded to these estates on the former's death. Le Noir was in turn succeeded by Stephen (d. 1137), Count of Penthievre, who was either his son or another brother. These Breton counts were territorial lords of Richmond, and are often reckoned as 'earls of Richmond', though they were not so in the strict later sense.
  (Wikipedia)
  
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  # Note: Founder (1110) Augustinian Abbey of St. Croix at Guincamp, Brittany, France.
  # Note: Founder Cistercian Abbey of Begard, Brittany, France.
  # Note: Held Honour of Richmond in England.
  
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      STEPHEN, a count of Brittany, youngest son of Eudon,[a] succeeded his eldest brother, Geoffrey Boterel I, or Geoffrey's son Conan in the Breton lands, and his brother Alan the Black in the honor of Richmond in England, thus uniting all the possessions of the family, but he appears to have been out of possession of the honor of Richmond for a time during the reign of William II. In March 1101, he was a surety for Henry I for the observance of an alliance with Robert, Count of Flanders, and on 3 September 1101 at Windsor he witnessed charters of the King for Herbert, Bishop of Norwich, and for St. Peter's, Bath. On 30 October 1107 he executed at Lamballe a charter for the abbey of SS. Sergius and Bacchus at Angers, and in 1123 at Guingamp one for the abbey of St. Melaine at Rennes. He was a benefactor of the abbey of St. Mary, York, and in the period 1125-35 confirmed to that house gifts of churches, tithes and lands in Yorkshire, Lincolnshire, Cambridgeshire, and Norfolk, which formed part of the honor of Richmond. About the year 1110 he and his, wife founded the Augustinian abbey of Ste. Croix at Guingamp, and In 1130 he founded the Cistercian abbey of Bégard.
  

Details of Stephen's family with Hawise de Guincamp