Clydno Eiddin; Nudd the Generous, son of Senyllt; Mordaf the Generous, son of Serfan; and Rhydderch Hael, son of Tudwal Tudelyd. These are all notable men of the era who are listed in the royal genealogies of the Bonedd Gwŷr y Gogledd, as is Elidyr Mwynfawr. According to one of the Triads of the Horses, Elidyr was also the husband of Rhun's sister Eurgain. Rhun then assembled an army and proceeded to the banks of the Gweryd (the banks of the River Forth or the Firth of Forth, which William Forbes Skene says was still called the 'Weryd' in 1165) in the North. The final outcome is not given in the Venedotian Code, but Rhun and his army remained in the North for a considerable length of time. The outcome according to Taliesin's Marwnad Rhun is the death of Rhun ap Maelgwn in battle. He was succeeded by his son Beli ap Rhun as King of Gwynedd. The reason why Elidyr was in Gwynedd and the circumstance of his death are not known, though it is certain from their actions that his northern relatives blamed someone in Gwynedd. There are later stories that add speculations, for example by asserting that Elidyr was contesting Rhun's succession to Maelgwn Gwynedd's throne, but these are nothing more than speculation. Caerhun Caerhun () is the site of the 2nd century minor Roman fort of Canovium, situated along the Roman road between the larger Roman forts of Deva (at modern Chester) and Segontium (near modern Caernarfon). It is supposed to have been one of Rhun's strongholds, and while definitive evidence of this is lacking, it is circumstantially supported by archeological research and the antiquity of the name Caerhun. Furthermore, it guards an important crossing of the River Conwy at Tal-y-Cafn which leads to the pass at Bwlch-y-Ddeufaen, an entrance to Eryri (), the defensive heartland of the Kingdom of Gwynedd. Its military significance would certainly have been noticed by both defenders and potential aggressors. Rhun in literature The story of The Dream of Rhonabwy in the 12th century Red Book of Hergest is a prose literary tale where the main character travels to the time of King Arthur in a dream. There he sees the famous men from many historical eras. In a passage where 24 knights arrive to seek a truce with the famous Arthur, Arthur considers the request by assembling his counselors where