Albanactus

Albanactus, according to Geoffrey of Monmouth, was the founding king of Albania or Albany. He is in effect Geoffrey's eponym for Scotland. His territory was that north of the River Humber. This myth was then taken up by Giraldus Cambrensis.

Legendary history in Geoffrey of Monmouth

Albanactus was stated to be the youngest of three sons of Brutus, a descendant of Aeneas of Troy. According to legend, upon their father's death, the eldest son Locrinus was given Loegria, Camber was given Cambria and Albanactus Albania. These names are merely reverse etymologies. Albanactus, for instance, is a reverse etymology of the Scottish word Albannach (Scotsman). Likewise, Locrinus represents the medieval Welsh word Loegria (England) (modern Welsh Lloegr), and Camber represents the Latin word Cambria or the Welsh word Cymru (Wales).

It is recounted that Albanactus was killed shortly after he began his reign, by Humber, king of the Huns. Humber invaded Albany from Germany and met Albanactus's army in battle, where Humber killed Albanactus. This forced the people of Albany to flee south to Albanactus's brother, Locrinus.