|Orkney and Shetland|
The name of the village, like most place-names on Shetland, is from the Old Norse language; from þveit, meaning 'small parcel of land'. The same word produces a village of the same name on Orkney Mainland, and the element "-thwaite" in many a Yorkshire place-name.
This name featured at no. 4 of the most vulgar sounding names in Rude Britain, along with its Orkney namesake.