The River Tay was written by Ptolemy in the 2nd century as Taoua, showing that its core form was already well established 2,000 years ago.
Linguistically, it looks older still. One proposal links it to an early Indo-European root tā- meaning “to melt” or “dissolve,” a word often applied to flowing water.
This well describes the Tay’s broad, steady movement through the heart of Scotland. Also, as the country’s longest river, it would have been named early and remembered continuously. Its genesis most likely lies in the late Bronze Age, perhaps around 1000 BCE or even earlier.
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