Amlawdd Wledig (Middle Welsh and other alternative spellings present in relevant sources include Amlawd, Amlawt, Anlawdd, Anlawd, Amlodd, Amlwyd, Aflawdd and Anblaud) was a legendary king of sub-Roman Britain.
The Welsh title [G]wledig, archaically Gwledic or Guletic and Latinised Guleticus, is defined as follows: "lord, king, prince, ruler; term applied to a number of early British rulers and princes who were prominent in the defence of Britain about the time of the Roman withdrawal; (possibly) commander of the native militia (in a Romano-British province)".
At least three different genealogies are suggested for Amlawdd Wledig: Amlawdd is said to have been the husband of Gwen, the daughter of Cunedda Wledig, the legendary northern king said either to have migrated[6] or to have been sent south by Vortigern to drive Irish invaders from the Kingdom of Gwynedd.
A number of figures from the Arthurian legends are suggested (with varying levels of plausibility) to have been the children of Amlawdd, including: Amlawdd Wledig is named in many sources to have been the maternal grandfather of King Arthur,[13] while others suggest he is a genealogical construct, created in order to justify the kinship connections referred to in the Welsh prose tale of Culhwch and Olwen between Arthur, Culhwch, St Illtud and Goreu fab Custennin.
[14] Amlawdd does not appear in the list of Kings of Britain given by Geoffrey of Monmouth.