Hrolfr was a Danish chieftain and a veteran of great raids in France and Ireland. In 895 he settled in England with his wife Poppa, their infant son Vilhjálmr, and a large band of followers. King Hogni of Jorvik let them settle in Devon, at that time a frontier region of Jorvik that was almost 100% Anglo-Saxon. The followers that Hrolfr brought to his new jarldom were a major step in the Norsification of the south.