1) Scottish boy name 
Sandie/y or Sawney was an English nickname for a Scotsman, now obsolete, and playing much the same linguistic role that `Jock` does now. Variations included Sanders and Sannock. The name is a Lowland Scots diminutive of the favourite Scottish first name Alexander (also Alasdair in Scottish Gaelic form, anglicised into Alistair) from the last two.....
Sawney is British slang for silly, daft, foolish.