Ambrosius Aurelianus was a war leader of the Romano-British who won an important battle against the Anglo-Saxons in the 5th century, according to Gildas. He also appeared independently in the legends of the Britons, beginning with the 9th-century Historia Brittonum. Eventually, he was transformed by Geoffrey of Monmouth into the uncle of King Arthur, the brother of Arthur's father Uther Pendragon, as a ruler who precedes and predeceases them both. He also appears as a young prophet who meets the tyrant Vortigern; in this guise, he was later transformed into the wizard Merlin.
Geoffrey V, called the Handsome, the Fair or Plantagenet, was the count of Anjou, Touraine and Maine by inheritance from 1129, and also Duke of Normandy by conquest from 1144. His marriage to Empress Matilda, daughter of King Henry I of England, led to the centuries-long reign of the Plantagenet dynasty in England. The name "Plantagenet" was taken from Geoffrey's epithet. Geoffrey's ancestral domain of Anjou gave rise to the name Angevin, and what modern historians name as the Angevin Empire in the 12th century.
Lud, according to Geoffrey of Monmouth's legendary History of the Kings of Britain and related medieval texts, was a king of Britain in pre-Roman times who founded London and was buried at Ludgate. He was the eldest son of Geoffrey's King Heli, and succeeded his father to the throne. He was succeeded, in turn, by his brother Caswallon. Lud may be connected with the Welsh mythological figure Lludd Llaw Eraint, earlier Nudd Llaw Eraint, cognate with the Irish Nuada Airgetlám, a king of the Tuatha Dé Danann, and the Brittonic god Nodens. However, he was a separate figure in Welsh tradition and is usually treated as such.
Geoffrey Fitz Peter, Earl of Essex was a prominent member of the government of England during the reigns of Richard I and John. The patronymic is sometimes rendered Fitz Piers, for he was the son of Piers de Lutegareshale, a forester of Ludgershall & Maud de Manderville.
Geoffrey was an illegitimate son of King Henry II of England who became bishop-elect of Lincoln and archbishop of York. The identity of his mother is uncertain, but she may have been named Ykenai. Geoffrey held several minor clerical offices before becoming Bishop of Lincoln in 1173, though he was not ordained as a priest until 1189. In 1173–1174, he led a campaign in northern England to help put down a rebellion by his legitimate half-brothers; this campaign led to the capture of William, King of Scots. By 1182, Pope Lucius III had ordered that Geoffrey either resign Lincoln or be consecrated as bishop; he chose to resign and became chancellor instead. He was the only one of Henry II's sons present at the king's death.
Maddan was a legendary king of the Britons as accounted by Geoffrey of Monmouth. He was the son of King Locrinus and Queen Gwendolen, who both ruled Britain separately.
Mempricius was a legendary king of the Britons, as recounted by Geoffrey of Monmouth. He was the son of King Maddan and brother of Malin.
Brutus Greenshield was a legendary king of the Britons as accounted by Geoffrey of Monmouth. He was the son of King Ebraucus.
Rud Hud Hudibras was a legendary king of the Britons as recounted by Geoffrey of Monmouth. He was the son of King Leil and ruled during a civil war.
Leir was a legendary king of the Britons whose story was recounted by Geoffrey of Monmouth in his pseudohistorical 12th-century History of the Kings of Britain. According to Geoffrey's genealogy of the British dynasty, Leir's reign would have occurred around the 8th century BC, around the time of the founding of Rome. The story was modified and retold by William Shakespeare in his Jacobean tragedy King Lear.
Rivallo was a legendary king of the Britons as accounted by Geoffrey of Monmouth. He was the son of King Cunedagius and was noted as a young king who reigned with moderation. Geoffrey describes him as a "peaceful and fortunate youth, who ruled the kingdom well".
Dyfnwal Moelmud was accounted as an early king and lawmaker among the Welsh, credited with the codification of their standard units of measure. He also figures as a legendary king of the Britons in Geoffrey of Monmouth's pseudohistorical History of the Kings of the Britons.
Morvidus was a legendary king of the Britons from 341 to 336 BCE., as recounted by Geoffrey of Monmouth. He was the illegitimate son of Danius by his mistress Tangustela.
Idvallo was a legendary king of the Britons as recounted by Geoffrey of Monmouth. He was the son of King Ingenius and he replaced King Enniaunus. Idvallo is said by Geoffrey to have reigned righteously to mend the ills his cousin had brought. He was succeeded by his cousin, Runo.
Historia regum Britanniae, originally called De gestis Britonum, is a pseudohistorical account of British history, written around 1136 by Geoffrey of Monmouth. It chronicles the lives of the kings of the Britons over the course of two thousand years, beginning with the Trojans founding the British nation and continuing until the Anglo-Saxons assumed control of much of Britain around the 7th century. It is one of the central pieces of the Matter of Britain.
Coilus was a legendary king of the Britons during the time of the Roman occupation of Britain as recounted in Geoffrey of Monmouth's pseudohistorical Historia Regum Britanniae. He was the son of King Marius and ruled following his father's death.
Caradocus, according to Geoffrey of Monmouth's Historia regum Britanniae, a pseudohistorical account of the kings of the Britons, was the duke of Cornwall under the reign of Octavius, who became king of Cornwall and died during the Emperor Magnus Maximus' reign.
Gorbonianus was a legendary king of the Britons as recounted by Geoffrey of Monmouth. He was the eldest son of King Morvidus, and the brother of Archgallo, Elidurus, Ingenius, and Peredurus.
Fiacha Finnolach, son of Feradach Finnfechtnach, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He took power after killing his predecessor, Fíatach Finn. He ruled for fifteen, seventeen, or twenty-seven years, depending on the source consulted, after which he, and the freemen of Ireland, were killed in an uprising of aithech-tuatha or "subject peoples", led, according to the Lebor Gabála Érenn and the Annals of the Four Masters, by Elim mac Conrach, or by Cairbre Cinnchait according to Geoffrey Keating. His wife Eithne, daughter of the king of Alba (Scotland), who was pregnant, fled home to Alba, where she gave birth to Fíachu's son, Tuathal Techtmar, who would ultimately return to Ireland to claim the throne. The Lebor Gabála Érenn synchronises his reign with that of the Roman emperor Nerva (AD 96–98). The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to AD 28–55, that of the Annals of the Four Masters to AD 39–56.
In Roman mythology, Atys was a descendant of Alba and the sixth king of Alba Longa. Geoffrey of Monmouth asserted in his Historia Regum Britanniae that Silvius succeeded Alba at the same time that Solomon began to build the Temple in Jerusalem, and king Leil of Britain founded Carlisle.
