The Stour is a river flowing through the counties of Worcestershire

Worcestershire

Worcestershire is a non-metropolitan county, established in antiquity, located in the West Midlands region of England. For Eurostat purposes it is a NUTS 3 region and is one of three counties that comprise the "Herefordshire, Worcestershire and Warwickshire" NUTS 2 region...

, the West Midlands

West Midlands (county)

The West Midlands is a metropolitan county in western central England with a 2009 estimated population of 2,638,700. It came into existence as a metropolitan county in 1974 after the passage of the Local Government Act 1972, formed from parts of Staffordshire, Worcestershire and Warwickshire. The...

 and Staffordshire

Staffordshire

Staffordshire is a landlocked county in the West Midlands region of England. For Eurostat purposes, the county is a NUTS 3 region and is one of four counties or unitary districts that comprise the "Shropshire and Staffordshire" NUTS 2 region. Part of the National Forest lies within its borders...

 in the West Midlands region of England. The Stour is a major tributary of the River Severn

River Severn

The River Severn is the longest river in Great Britain, at about , but the second longest on the British Isles, behind the River Shannon. It rises at an altitude of on Plynlimon, Ceredigion near Llanidloes, Powys, in the Cambrian Mountains of mid Wales...

, and it is about 25 miles (40.2 km) in length. It has played a considerable part in the economic history of the region.
The river-name

Hydronym

A hydronym is a proper name of a body of water. Hydronymy is the study of hydronyms and of how bodies of water receive their names and how they are transmitted through history...

 Stour, very common in England, does not occur at all in Wales; Crawford noted two tributaries of the Po River

Po River

The Po |Ligurian]]: Bodincus or Bodencus) is a river that flows either or – considering the length of the Maira, a right bank tributary – eastward across northern Italy, from a spring seeping from a stony hillside at Pian del Re, a flat place at the head of the Val Po under the northwest face...

 near Turin, spelled Sture.