Complex sentence: Ewald the Black and his companion Ewald the Fair were two priests and natives of Northumbria, England whowere distinguished as Ewald the Black and Ewald the Fair, from the difference in the colour of their hair and complexions.
Split into simpler sentences: Ewald the Black and his companion Ewald the Fair were two priests and natives of Northumbria, England. Both bore the same name, but were distinguished as Ewald the Black and Ewald the Fair, from the difference in the colour of their hair and complexions.