indicate the level to which a name has been verified.
Meaning & History
Most famously borne in the pen name of American author and one time Mississippi riverboat pilot Mark Twain (1835-1910), whose real name is Samuel Langhorne Clemens. The term twain is an Old English word for "two." The name Mark Twain is derived from a riverboat term meaning a mark of two fathoms depth on a line sunk in the river. Two fathoms is 12 feet (3.7m) which provided minimum clearance for a boat to safely pass without getting stuck on ground.