Golf Myth:Golf got it's name from a sign over St. Andrews gate that said "Gentleman Only Ladies Forbiden"
Reality:The word golf, or in Scots language gouf, is usually thought to be a Scots alteration of Dutch colve meaning "stick, club, or bat"
Golf Myth:There are 18 holes in a golf course because there are 18 shots in a fifth.
Reality:The original course at St. Andrews featured eleven holes, laid out end to end from the clubhouse to the far end of the property. One played the holes out, turned around, and played the holes in, for a total of 22 holes. In 1764, several of the holes were deemed too short, and were therefore combined. The number was thereby reduced from 11 to nine, so that a complete round of the links comprised 18 holes.

I like the myths better.