“Stephanus comes Britanniæ” donated property to Rumburgh priory, for the souls of “comitissa Haudewisa…filiorum meorum et filiarum…Galfridi…Alani, Henrici” by undated charter. The primary source which confirms her parentage has not yet been identified. "Henricus, comitis Stephani filius" donated property to the priory of Saint-Magloire de Léhon, for the souls of "patris…et fratris Stephani…et Alani comitum, matris…mee Hadvise", by charter dated 1148. 1
He [Stephen, Count of Brittany] married Hawise, whose parentage is unknown (e). He died 21 April, probably in 1135 or I 136. His tomb was in the quire of St. Mary's, York. 2
(e) She was living in 1135, when, as "comitissa Hadewisa" she witnessed her husband's charter for St. Edmunds. In the first edition of the present work it is stated that she was Countess of Guingamp and that Stephen became Count of Guingamp in her right. For this there seems to be insufficient foundation: Guingamp in the diocese of Treguier would be a part of the lands of Count Eudon.