Scotch

adjective, variation of Scottish or Scots; USAGE: The use of Scotch as an alternative to Scottish or Scots is generally regarded as offensive or old-fashioned by Scottish people… (COD); note that use of Scotch in WIEC (and therefore the following quotes) does not carry a negative connotation

“My father was Irish, and my mother was of Scotch descent.”

“… the ships that run aground and survivors just moved ashore, and there was no way of getting home, and they’d move in with Scotch and Irish families…”