As a 6 year old Leo Horn played football on sundays on a field on which his dad let his cows graze during the week. At 17 his knee injury was bad enough for him to stop playing and start a career as a referee. In 1938 he became a KNVB referee. Horn held a FIFA badge between 1951 and 1966. He died in 1995.
Horn took charge of three matches in the 1962 World Cup and was a lines man (together with Davidson) in the final. He was the ref in the legendary match in 1953 when England lost their first ever home match (against Hungary 3-6). He twice took charge of a European Cup final ('57-'62) and also twice the final of the Copa Libertadores ('63, '64).
Being Jewish, the Horn family had to hide during the German occupation of the Netherlands in WW II. Leo and his older brother joined the resistance. Leo Horn took on the alias of "doctor Van Dongen". He provided shelters for people who had to hide and even took part in a raid on a weapons depot in the centre of Amsterdam. In broad daylight. His brother died in a camp.
After the war Leo Horn became a successful business man owning a chain of 16 shops selling cloth. Still somewhat in the resistance, he was outspoken against for instance FIFA, which may have cost him a place in the 1966 World Cup finals. He was very strict and authoritarian. He took charge of more than 1500 matches in the Netherlands, and 133 internationally.