Tostig Godwinson (~1026-25 September 1066), Earl of Northumbria, was one of the brothers of King Harold of England, its last Saxon king. Tostig married Judith (Fausta) of Flanders (1030-5 March 1094), the half-sister of Count Baldwin V of Flanders and, thus, the aunt of Matilda of Flanders who was the wife of William the Conqueror.
Popular (as opposed to scholarly) non-fiction books that cover Tostig's life and role in history include:
- 1066 The Year of the Conquest (©1977) by David Howarth (ISBN 0-88029-014-5)
- The Making of the King 1066 (©1966) by Alan Lloyd (ISBN 0-88029-473-6)