Teudebur of Alt Clut (or Teudebur map Beli) was the ruler of Alt Clut (the area around modern Dumbarton Rock), in the early-to-mid eighth century (probably 722–52).
According to the Harleian genealogies, he was the son of Beli II, his probable predecessor as king.
His reign coincided with that of the illustrious Pictish king Óengus mac Fergusa (Onuist map Uurguist).
[3] Mygedawc is often identified with modern Mugdock, on the boundary between Dunbartonshire and Stirlingshire,[4] but this identity is by no means certain.
The Annals of Tigernach, which styles him Taudar mac Bile, rí Alo Cluaide, put his death at 752,[5] and for this reason, we can be certain Teudebur was the British king responsible for the British victory.