Wikipedia
Winchcombeshire
Winchcombeshire, an ancient county in the South West of England, in the 10th and 11th centuries, developed around its county town, Winchcombe.
It appears that it had a separate existence as a petty kingdom prior to this time. King Coenwulf of Mercia is associated with the region before becoming king. A link with the earlier kingdom of Hwicce has been surmised, given the apparent link between Coenwulf's family and that of the kings of Hwicce.
It appears to have been amalgamated with Gloucestershire after Cnut conquered England in 1017, although some parts of the county appear to lie in what is usually considered to be Worcestershire.