Horsa

Hengist and Horsa are legendary brothers said to have led the Angles, Saxons, and Jutes in their invasion of Britain in the 5th century. Tradition lists Hengist as the first of the Jutish kings of Kent.

According to early sources Hengist and Horsa arrived in Britain at Ebbsfleet on the Isle of Thanet. For a time they served as mercenaries for Vortigern, King of the Britons, but later they turned against him (British accounts have them betraying him in the Night of the Long Knives). Horsa was killed fighting the Britons, but Hengist successfully conquered Kent, becoming the forefather of its kings.

A figure named Hengest, who may be identifiable with the leader of British legend, appears in the Finnsburg Fragment and in Beowulf.

Legends of horse-associated founding brothers are attested among other Germanic peoples, and appear in other Indo-European cultures. As a result, scholars have theorized a pan-Germanic mythological origin for Hengist and Horsa, stemming originally from divine twins found in Proto-Indo-European religion. Other scholars, including J. R. R. Tolkien, have argued for a historical basis for Hengist and Horsa.

The Old English names Hengest [hendʒest] and Horsa [horsɑ] mean "stallion" and "horse" respectively.

...
Wikipedia