Harold Harefoot is a historical figure, and as such, there are not many synonyms for his name. However, some possible alternatives could be "Harold the Fleet-Footed," "Harold the Nimble," or "Harold the Swift." These terms describe his supposed physical prowess, which was a key attribute for a warrior in medieval times. Another option could be "Harold I of England," which is his official title as king, or simply "Harold," which is a common first name. While these synonyms may not encompass all of the nuance and detail of his life story, they can help to evoke a sense of the times and culture in which he lived.