Corpus of Electronic Texts Edition
The Irish version of the Historia Britonum of Nennius (Author: unknown)

Historia 28

Cruithnechan son of Lochit, son of Ingi, went over from the sons of Mileadh to the Britons of Foirtren, to fight against the Saxons, and he defended the country of Cruithen-tuath for them, and he himself remained with them i. e. with the Britons. But they had no women, for the women of Alba had died. And Cruithnechan went back to the sons of Mileadh, and he swore by heaven and earth, and the sun and the moon, by the dew and elements, by the sea and the land, that the regal succession among them for ever should be on the mother's side; and he took away with him twelve women that were superabundant with the sons of Mileadh, for their husbands had been drowned in the western sea along with Donn; so that the chiefs of the Cruithnians have been of the men of Eri from that time ever since.