"The Isis" is an alternative name for the River Thames, used from its source in the Cotswolds until it is joined by the Thame at Dorchester in Oxfordshire. It derives from the ancient name for the Thames, Tamesis, which in the Middle Ages was believed to be a combination of "Thame" and "Isis". Notably, the Isis flows through the city of Oxford.
Punting on the Isis at Oxford.
Rowing on the Isis opposite the Oxford college boathouses.
Henry B. Wimbush, "Oxford the Isis", c. 1910, showing college barges
Thame and Isis, carved by Anne Seymour Damer.
The River Thames, known alternatively in parts as the River Isis, is a river that flows through southern England including London. At 215 miles (346 km), it is the longest river entirely in England and the second-longest in the United Kingdom, after the River Severn.
City of London with Tower Bridge
Image of the deity Æsus on the Gallo-Roman "Pillar of the Boatmen"
A statue of Old Father Thames by Raffaelle Monti at St John's Lock, Lechlade
Sculpture of Tamesis. Downstream keystone of the central arch of Henley Bridge