Four in hand is arguably the most popular necktie knot nowadays due to its simplicity and beautiful style. It became fashionable in Britain in 1850’s. The name originally meant a carriage with four horses and one driver. Later it became the name of a gentlemen’s club in London.
Four in hand tie knot is also called simple knot or schoolboy knot. Check out more how to tie four in hand knot in the following link.