Rollo

Rollo or Gaange Rolf (Rolf the Walker, (c. 860 – c. 930 AD) was a Viking who invaded France and became the first ruler of Normandy. He is retroactively regarded as the first Duke of Normandy, although that title is not known to have been in use at the time. He was an unusually large man for his time, too heavy for a horse to carry, resulting in the nickname Rolf the Walker. Although the French King Charles the Simple defeated Rollo at the Siege of Chartres in 911, Charles realized that he could not keep Rollo out indefinitely, and soon made treaty with him, establishing Normandy.

Rollo in "The Old Grind"
When Fenia the giantess traveled to England, she met a band of Danish raiders. Their leader introduced himself as Ganga-Hrolf, Rollo for short.