Welshland

For a century after Hengist and Horsa the green island which they were conquering was a "Welshland," or abode of strangers, while the "Dutchland," or home of "the folks," was the half-sunken coast they had left behind them.

Source: wiktionary

It is now practically established that the legend emanated from the Kymri, spreading from "Welshland" through Cornwall into the Welsh-speaking colony of Brittany upon the opposite shore.

Source: wiktionary

But I have opposed them, and think to withsay, for I have been steward of all Britain's land, and earl I am potent, unlike to my companions, and I have Welshland half-part in my hand; more I have alone than the others all clean.

Source: wiktionary

Welshland: Now called Wales, Welshland lay just west of Mercia and was made up of Celts that held many different lands, which included place names like Gwent and Gwynedd.

Source: wiktionary