Johan Hendrik Weidner (October 22, 1912, in Brussels, Belgium – May 21, 1994, in Monterey Park, California, United States) was a highly decorated Dutch hero of World War II.

Johan Hendrik Weidner Jr. was born in Brussels to Dutch parents. Although his birth name was Johan Hendrik, he used to call himself "Jean" and later in the U.S., "John". He was the eldest of four children, and grew up in Switzerland, near the French border at Collonges-sous-Salève - a village in the French department of Haute-Savoie, where his father taught Latin and Greek at the Seventh-day Adventist Church seminary.

Following his education at French public schools, he attended basic courses at the Seventh-day Adventist Seminary in Collonges-sous-Salève. His father Johan Hendrik Weidner Sr. who studied at the University of Geneva, and had been a minister for the Seventh-day Adventists in Brussels and Switzerland, hoped Jean would follow in his footsteps. To his father's regret, he decided to go into business, and in 1935 he established a textile import/export business in Paris, France.

Around this time he went to Geneva to attend sessions of the League of Nations, and saw firsthand how ineffective that body was in preventing the outbreak of war in 1939.

At the outbreak of World War II Jean was living in Paris. With the subsequent German occupation of France he fled with several others from Paris to Lyon in the unoccupied part of France. Because he had to abandon his Parisian business, he began a new business in Lyon. In 1941, Jean founded "Dutch-Paris", an underground network of which the location of his Lyonnaise textile business soon became its headquarters. In order to get passes to go in and out of the Swiss frontier zone, he set up a second textile shop in Annecy at the end of 1942.

Dutch-Paris became one of the largest and most successful underground networks for people persecuted for faith or race, Allied pilots, and persons of great Dutch importance to help them escape via Switzerland and Spain. This escape route was also used for smuggling documents. In the Netherlands this message line was also known as "The Swiss Way".

In its heyday, 300 people were part of this underground network, of which about 150 people were arrested. 40 people were slain or died from the effects of captivity, including his sister who helped to coordinate escapes from Paris. The escape route has greatly contributed to the French Resistance, and is responsible for the rescue of more than 1,080 people, including 800 Dutch Jews and more than 112 downed Allied pilots. Jean was one of the most sought after underground leaders of France, for whom the Gestapo at one time offered a reward of five million francs for his arrest.

In February 1944, a young female courier was arrested by the French police and extradited to the Gestapo. Against all rules, she had a notebook with her containing names and addresses of Dutch-Paris members. She was brutally interrogated by a guard that held her head under cold water until she nearly drowned. Under torture she revealed many names of key members of the underground network. As a result, a large number of Dutch-Paris members were arrested (See more details in Suzanne Hiltermann-Souloumiac).