The village dates back, at least, to Anglo-Saxon times and its name has its origins in the English as spoken in that era.

Tewin is known to have been settled by the Angles in 449 AD; the name being a derivative of the Old English words for the Norse god Týr (“Tiw”) and meadow (“Ing”).
However the name varies over the centuries – in the Domesday Book it is Tewinge and Theinge – and in the 16th century Tewinge, Tewing and Twying, but it is thought the village became Tewin in the 18th century.
An alternative derivation from Britonnic is possible, connected with the modern Welsh Tywyn or Dune.

In December 1782 the highway robber Walter Clibbon (a local pie-maker) was fatally wounded by the roadside near Queen Hoo Hall.
Clibbon, together with his two sons, was believed responsible for numerous robberies and at least one murder in the neighbourhood of Ware.
One of his sons, Joseph, was convicted at Hertford Assizes and executed the following March, although the other escaped.
Clibbon's Post can be observed from the road in Brickground Wood, just east of Tewin, and this is the spot where Walter Clibbon was interred.

The Diaries of John Carrington a farmer and minor public official document life in Tewin from 1798–1810.
The village dates back, at least, to Anglo-Saxon times and its name has its origins in the English as spoken in that era.
Tewin is known to have been settled by the Angles in 449 AD; the name being a derivative of the Old English words for the Norse god Týr (“Tiw”) and meadow (“Ing”). However the name varies over the centuries – in the Domesday Book it is Tewinge and Theinge – and in the 16th century Tewinge, Tewing and Twying, but it is thought the village became Tewin in the 18th century. An alternative derivation from Britonnic is possible, connected with the modern Welsh Tywyn or Dune.
In December 1782 the highway robber Walter Clibbon (a local pie-maker) was fatally wounded by the roadside near Queen Hoo Hall. Clibbon, together with his two sons, was believed responsible for numerous robberies and at least one murder in the neighbourhood of Ware. One of his sons, Joseph, was convicted at Hertford Assizes and executed the following March, although the other escaped. Clibbon's Post can be observed from the road in Brickground Wood, just east of Tewin, and this is the spot where Walter Clibbon was interred.
The Diaries of John Carrington a farmer and minor public official document life in Tewin from 1798–1810.
Tewin