cymry
Word family
Synonym discussion
Sense: noun/1
Cymry, the Welsh, and Welsh people can all refer to the people of Wales, but they are used in different ways. The Welsh is the normal everyday English expression. Welsh people is the clearest neutral phrase when you want plain modern wording. Cymry is the Welsh name for the people themselves, so it often appears in writing that wants to stress Welsh identity, history, or language. Cymro names one Welsh man, while Cymraes names one Welsh woman, but both are rarer in English than Welsh man and Welsh woman. A historian may write about the Cymry of the early Middle Ages, while a news report would more naturally say the Welsh people.
Etymology
Cymry comes into English from Welsh, where it is the plural word used for the Welsh people themselves. It is related to Cymru, the Welsh name for Wales, and goes back to an older Brittonic idea meaning fellow countrymen or people of the same land. In English, the word is mostly kept for historical, cultural, or identity-focused writing rather than ordinary everyday use.