Definition of "Cymry"

The natural conclusion is that the Silurians or Iberians, now represented by the little, dark Welshmen, are the oldest existing race in Wales, and, though now speaking Cymraeg, were long before the Cymry there.

1881, James Bonwick, Who Are the Welsh? (Our Nationalities; III), London: David Bogue, […], page 46

“What brings you into our lands?” The strange looking barbarian asked again. / He was speaking Cymraeg, which means the language of the aborigines, or “the language of the first race.” It was the same language of the Cymry of which Cedric and his tribe was a people of.

2001, Jodie K. Scales, Of Kindred Celtic Origins, volumes 1 (Myths, Legends, Genealogy and History of an Ordinary American Family), Lincoln, Neb.: Writers Club Press, iUniverse, page 416