The following is not much help in solving this mystery, but - I have asked an 80 year old who lived in a row by the Upper Bilson pub and she had never heard of it. Also it is known that where a group of families occupied a row of houses they named it after themselves. For instance on Harrow Hill (or Harry Hill as we natives still call it) there is a Boseley Row.
If the forum can't solve it soon send a letter in to the Forest of Dean and Wye Valley Review free newspaper email: review-editor@internet-today.co.uk If somebody responds I'm sure a forum member would post up any reply.