Lamer, Lamet, Lumet, Orcans, Orcaus
An ancestor of Lot and Gawain. He was king of Orkney, which was named after him, in the time of Joseph of Arimathea.
He was accused of murdering King Marahant of Ireland’s son. Before King Lucius of Britain, he was successfully defended against this charge by Peter, a relative of Joseph of Arimathea who had stumbled into Orcant’s kingdom. In admiration of Peter, Orcant converted to Christianity, taking the name Lumet (Lamet). Peter married Orcant’s daughter, Camille.
It would appear that the name Orcant is derived from the Latin name for his realm, Orcades, and may simply be a title rather than a personal name.
Source
Vulgate Estoire del Saint Graal | 1220-1235