The actual historical existence of both Hengest and Horsa has been called into question numerous times, with many historians labeling these two as legendary 'divine twins' along the order of Romulus and Remus. It is perhaps more likely that Hengest, meaning 'Stallion', was an honorific for an actual warlord, while Horsa was a later accretion to the story, perhaps as a misreading of a gloss in a manuscript that was written to define the name Hengest as meaning 'horse'.
Later accounts, in the Anglo-Saxon Chronicle, the Historia Britonum, by Geoffrey of Monmouth, and by Robert Wace add further details from tradition and legend about Hengest's career. The Anglo-Saxon Chronicle dates his death to 488, but does not provide a cause.