Rolf "Rollo" Ragnvaldsson Of Norway
- Born: Abt 878, Maer, Nord-Trondelag, Norway
- Marriage (1): Poppa de Valois Duchess Of Normandy in 891
- Marriage (2): Gisèle Duchess Of Normandy in 912 in France
- Died: Abt 931, Notre Dame, Rouen, Normandy, France about age 53
- Buried: Notre Dame, Rouen, Nornandie, Neustria
Rollo (also called Rolf or Rou; sometimes spelled Hrolf; in French, Rollon; known as "the walker" or "Gangler" or Ganger; sometimes called Robert and sometimes known as Rollo the Viking) was the Scandinavian raider who founded the French duchy of Normandy.
Leaving Norway to embark on pirating expeditions and raid England, Scotland, and Flanders, Rollo headed into France around 911 and settled along the Seine, besieging Paris. Charles III (the Simple) of France was able to hold Rollo off for a while, but he eventually negotiated a treaty to stop him.
The treaty of Saint-Clair-sur-Epte gave Rollo part of Nuestria in return for his agreement that he and his fellow Vikings would stop pillaging any further in France. Because the region was settled by Northmen or "Normans," the territory took on the name "Normandy," and Rouen became its capital. Before Rollo died he turned over the governance of the duchy to his son, William I (Longsword). A rather questionable biography of Rollo and other dukes of Normandy was written in the eleventh century by Dudo of St. Quentin.
Rollo, in addition to being the 3rd great-grandfather of William the Conqueror, is also the 33rd great-grandfather of Eric and Evan Obrock. Rollo's brother, Einar "Turf" Ragnvaldsson is Eric and Evan's 34th great-grandfather through a different line.
Rolf married Poppa de Valois Duchess Of Normandy, daughter of Bérenger de Bayeux Count of Rennes and daughter of Gurvand, in 891. (Poppa de Valois Duchess Of Normandy was born about 880 in Evreux, Neustria.)
Rolf next married Gisèle Duchess Of Normandy in 912 in France.