References to Rollo extracted from 

Dudo of St. Quentin's Gesta Normannorum (Deeds of the Normans)

Rollo is expelled from Dacia
Rollo plunders the Angles
Rollo's o dream and alliance  King Alstem of East Anglia
Rollo departs for Francia 
Rollo is attacked by Frisians
Rollo arrives at Rouen
Franks, Burgundians and Aquitanians fight  Rollo for the control of the future Normandy:  :  William son of Rollo and Popa born

Rollo adopts  Christianity, and is offered Gisla (Daughter of King Charles) as a wife. 

Rollo marries Gisla

Dudo praises God and faith

William, Rollo son by Popa of Bayeux
 Rollo's asked to step down in favor of his son William

Rollo transfers power over Normandy and Brittany to William,

 William marries