Jock

Etymology
Believed to be a Scots variant of Jack. Because of its specific association with Scotland, the British English slang term is believed by most sources to be derived from the frequency of the use of the given name in Scotland, rather than from the "common man" etymology.

Proper noun

 * 1) A nickname.
 * 2) A given name.
 * 3) A surname.
 * 1) A surname.

Noun

 * 1)  A Scot.

Usage notes
Some speakers consider the term pejorative. Others consider it no more pejorative than, for example, the similar generic use of "Joe".