Standard bearer at Senlac; bro. of Geoffroi du Bec and Ralph de Bec; son of
Rolf/Rou of Bec-aux-Couchois. Received large estates in England, where he held
in-chief and by barony in Hampton, Berks, Dorset, Somerset, Devon, buckingham,
Gloucester and Hereford, and as an under-tenant in Wilts, Somerset, Buckingham
and Gloucester. [Falaise Roll, p. 23, 106]
Toustain Fitz Rou came from Bec-aux-Cauchois and supports the belief that
Gilbert Crispin I and Rou (supposed bro. of Herluin), Toustain's father were
brothers. [Falaise Roll, p. 151]