How did the name Scot originate?
The name Scot to refer to the people who live in the north of the British Isles comes from the Latinised form of the name of an Irish tribe, the Scotti, who moved to the south-west of Scotland in the 6th century to form the Kingdom of Dalriada. When this was unified with Pictland by King Kenneth I MacAlpin, it became known as Scotland
A popular myth as to the origin of the Scotii's name is that a leader of the Scotii traveled south to Egypt, married an Egyptian princess called Scotia, but that all sounds rather fairy story to me
A scot is a Scandinavian word for tax or payment. It came to the UK as redistributive taxation, levied in the early 13th century, as a form of municipal poor relief. The term is a contraction of 'scot and lot'. Scot was the tax and lot, or allotment, was the share given to the poor. Being scot free just meant that you didn't have to pay the tax.
Walter Scot has written: 'Metrical history of the honourable families of the name of Scot and Elliot, in the shires of Roxburgh and Selkirk' 'A true history of the several honourable families of the right honourable name of Scot' -- subject(s): Early works to 1800 'Metrical history of the honourable families of the name of Scot and Elliot'