Alfred the Breton explained

Alfred the Breton (fl. 1086) (Latinized to Alvred Brito^[1]) was one of the Devon Domesday Book tenants-in-chief of King William the Conqueror. He had 22 landholdings in the county of Devonshire held in-chief according to the Domesday Book of 1086,^[2] and held further lands as a mesne tenant, including the manor of Panson in the parish of St Giles-in-the-Heath.^[3] His manors later descended to the feudal barony of Plympton.^[4]

References

1. As his name appears in the Domesday Book (with genitive form Alvredi Britonis) Thorn, Caroline & Frank, (eds.) Domesday Book, (Morris, John, gen.ed.) Vol. 9, Devon, Parts 1 & 2, Phillimore Press, Chichester, 1985, Part 1, Chapter 39
2. Thorn, Caroline & Frank, (eds.) Domesday Book, (Morris, John, gen.ed.) Vol. 9, Devon, Parts 1 & 2, Phillimore Press, Chichester, 1985, Part 2 (Notes), Chapter 39:1-22
3. Thorn & Thorn, 35:4
4. Thorn & Thorn, Part 2 (notes), Chapter 39