In the meantime Brutus had consummated his marriage with his wife Ignoge. By her he had three sons called Locrinus, Kamber and Albanactus, all of whom were to become famous. When their father finally died, in the twenty-third year after his landing, these three sons buried him inside the walls of the town which he had founded. They divided the kingdom of Britain between them in such a way that each succeeded to Brutus in one particular district. Locrinus, who was the first-born, inherited the part of the island which was afterwards called Loegria after him. Kamber received the region which is on the further bank of the River Severn, the part which is now known as Wales but which was for a long time after his death called Kambria from his name. As a result the people of that country still call themselves Kambri today in the Welsh tongue. Albanactus, the youngest, took the region which is nowadays called Scotland in our language. He called it Albany, after his own name. [II.1]

The three main divisions of the island of Britain, according to Geoffrey, are all derived from the names of the sons of Brutus: LOEGRIA, familiar as the Logres of Arthurian romance, is named for Locrinus, the eldest. Tatlock notes that Geoffrey never uses the Latin form Anglia for England, but always Loegria, from the Welsh Lloegr (p. 19).

Like ALBANY and KAMBRIA, Loegria tends to appear in the early sections of the Historia in the context of struggles for power over the whole of the island:

Some time later a certain young man called Dunvallo Molmutius came into prominence because of his personal courage. The son of Cloten King of Cornwall, he excelled all the other kings of Britain by his good looks and his bravery. Almost as soon as he had succeeded to the kingship of Cornwall after his father's death, he attacked Pinner, King of Loegria, and killed him in a pitched battle. [II.17]

Belinus and Brennius, the two sons of Dunvallo, each of whom was determined to inherit the kingship, now began a great war of attrition against each other.... at length their friends intervened to make peace between them. These friends decided that the kingdom should be divided between the two of them in such a way that Belinus should be crowned King of the island and hold Loegria, Kambria and Cornwall, he being the elder.... [III.1]

Later, Loegria appears in the ecclesiastical organization of Britain after the conversion of the island to Christianity:

Loegria itself was placed under the Metropolitan of London, together with Cornwall. The Severn divides these last two provinces from Kambria or Wales, which last was placed under the City of Legions. [IV.19]

The tyrant Gormund is responsible for the destruction of the monasteries of Loegria:

Many priests fled in a great fleet to Armorican Britanny, with the result that the whole church of the two provinces of Loegria and Northumbria lost its monasteries. [XI.10]

Loegria is the last place mentioned in the Historia, as it becomes the kingdom of the Saxons:

The Saxons, on the other hand, behaved more wisely. They kept peace and concord among themselves, they cultivated the fields, and they rebuilt the cities and castles. They threw off completely the dominion of the Britons and under their leader Adelstan, who was the first among them to be crowned King, they ruled over the whole of Loegria. [XII.19]