The term Cambria is first attested in Geoffrey of Monmouth in the 12th century as an alternative to both of these, since Britannia was now ambiguous and Wallia a foreign import, but remained rare until late in the Middle Ages.
The use of Cymry as a self-designation seems to have arisen in the post-Roman era, to refer collectively to the Brittonic-speaking peoples of Britain, inhabiting what are now Wales, Cornwall, Northern England, and Southern Scotland.
The second son, Camber, was bequeathed everything beyond the Severn, which was called after him Cambria (later Wales and then-Brittonic areas immediately to the north and south of it).
This legend was widely accepted as fact throughout the 12th–16th centuries, though it bears no resemblance to actual political, demographic, or linguistic history.
Once the name used for most of upland Wales, the term Cambrian Mountains is now more localised and includes the area from Pumlumon down to Mynydd Mallaen.
In horticulture, Cambria orchids are those that are hybrids between genera Odontoglossum, Oncidium, Brassia, and Miltonia, all members of the subtribe Oncidiinae.