The name – which was spelled in various alternative forms, including Estrighoiel and Strigoiel in the
Domesday Book of 1086 – probably derives from the
Welsh word
ystreigyl meaning 'a bend in the river'. An alternative suggestion is that it derives from Welsh words
ystre, meaning boundary or dyke, and
gwyl, meaning watch or guard; a combined word *
ystregwyl could mean "well-guarded border (or dyke)", perhaps referring to the location's proximity to the southern end of
Offa's Dyke. In the
medieval period the town which grew up between the port, the
castle, and the
priory church became known as Chepstow, from the old English or
Saxon ceap /
chepe stowe meaning market place. The castle and lordship retained the name Striguil until about the 14th century, when they adopted the English name of the town. The lordship was also known, in some medieval documents, as Netherwent, that is the lower (southern) part of the former Welsh
Kingdom of Gwent. ==The Lordship of Striguil==