Dudo's chronicle about Rollo seizing
Rouen in 876 is supported by the contemporary chronicler
Flodoard, who records that Robert of the
Breton March waged a campaign against the Vikings, nearly levelling Rouen and other settlements. Eventually, he conceded "certain coastal provinces" to them. Although, scholars have debated this and have said that Rollo did not even arrive in
West Francia until after the year 876, making this timeline given by Dudo wrong. According to Dudo, Rollo struck up a friendship in England with a king called “
Alstem”. This has puzzled many historians, but recently this person has been identified as
Guthrum, the Danish leader whom Alfred the Great baptised with the name “
Athelstan”, and was recognised as King of the East Angles in 880. Dudo recorded that when Rollo controlled Bayeux by force, he carried off the beautiful
Popa or Poppa, a daughter of Berenger, Count of Rennes. He married her, and they had a son and heir,
William Longsword. Her parentage is uncertain, and may have been invented after the fact to legitimize her son's lineage, as many of the fantastic genealogical claims made by Dudo were. She may have come from any country with which the Norse had contact, as Dudo is a highly unreliable source who may have written his chronicle primarily as a didactic tool to teach courtly values. There are few contemporary mentions of Rollo. In 911,
Robert I of France, brother of Odo, again defeated another band of Viking warriors in Chartres with his well-trained horsemen. This victory paved the way for Rollo's baptism and settlement in Normandy. In return for formal recognition of the lands he possessed, Rollo agreed to be baptised and assisted the king in defending the realm. As was custom, Rollo took the
baptismal name “Robert”, after his godfather, Robert I. The seal of the agreement was to be a marriage between Rollo and
Gisela, daughter of Charles, possibly her legitimate father. Since Charles first married in 907, that would mean that Gisela was at most 5 years old at the time of the treaty of 911 which offered her in marriage. It has therefore been speculated that she could have been an illegitimate daughter. However, a diplomatic child betrothal need not be doubted. The earliest record of Rollo is from 918, in a charter of
Charles III to an abbey, which referred to an earlier grant to "the Normans of the
Seine", namely "Rollo and his associates" for "the protection of the kingdom". Dudo retrospectively stated that this pact took place in 911 at
Saint-Clair-sur-Epte. Dudo narrates a humorous story not corroborated by other primary sources about Rollo's pledge of fealty to Charles III as part of the
Treaty of Saint-Clair-sur-Epte. The attendant bishops urged Rollo to kiss the king's foot to prove his allegiance. Rollo refused, saying "I will never bow my knees at the knees of any man, and no man's foot will I kiss." Instead, Rollo commanded one of his warriors to kiss the king's foot. The warrior complied by raising the king's foot to his mouth as the king was standing, which "caused the king to topple backward" much to the amusement of their entourage. On taking his oath of fealty, Rollo divided the lands between the rivers
Epte and
Risle among his chieftains and settled in the
de facto capital of Rouen. Given Rouen and its
hinterland in return for the alliance with the
Franks, it was agreed upon that it was in the interests of both Rollo himself and his Frankish allies to extend his authority over Viking settlers. This would appear to be the motive for later concessions to the Vikings of the Seine, which are mentioned in other records of the time. When Charles III was being deposed by
Rudolph of France he appealed to Rollo and , another one of his Norman allies. With their combined army they marched to his aid in fulfilment of their pledge to the
Carolingians, but were stopped at the
Oise River by Charles' opponents who traded their cooperation for more territorial concessions. The need for an agreement was particularly urgent when
Robert I, successor of Charles III, was killed in 923. Rudolph was recorded as sponsoring a new agreement by which a group of Norsemen conceded the provinces of the Bessin and Maine. These settlers were presumed to be Rollo and his associates, moving their authority westward from the Seine valley. It is still unclear as to whether Rollo was being given lordship over the Vikings already settled in the region to domesticate and restrain them, or the Franks around
Bayeux to protect them from other Viking leaders settled in eastern
Brittany and the
Cotentin peninsula. Rollo died sometime between a final mention of him by
Flodoard in 928, and 933 – the year in which a third grant of land, usually identified as being the Cotentin and Avranchin areas, was given to his son and successor
William. ==Rollo's role in Norman conversion to Christianity==