Monkey Wrench
The monkey wrench was invented by London blacksmith Charles Moncke. When it was first used, it was called Moncke's Wrench, but the name degenerated over time because Moncke was pronounced "MUN-kee."I've read in several places that the term is British in origin and that it pre-dates Moncke by several decadesThere are two popular thoughts on this.One is the Charles Moncke, a London blacksmith invented this tool and the name quickly became corrupted to "monkey". Some doubt this because the British called this invention a spanner, not a wrench.Second, the Boston Transcript credited a Yankee named Monk, employed by Bemis and Call in Springfield with inventing this tool in 1856.It's only called that by jokers who don't know the proper name is 'pipe wrench'