Abraham Van Nuyssen Janssen (1567-1632), Flemish, mythological and religious painter.
Albert, Edouard Janssen (1883-1966), Belgian economist, banker, and Minister of Finance.
Arnold Janssen (1837-1909) - saint, evangelist and founder of the Society of the Divine Word.

Buro Jansen & Janssen; Internet activist group exposing abuses of privacy & freedom of speech.
Cornelius Janssen, most important native English, Baroque portraitist of the early 17th century.
Frans Janssen, digital artist; using the computer as media.
Gereart Janssen (? - 1611) - aka Garet Johnson; family of monument carvers and stone mason.
Gerardus, Lambertus (1859 - 1932) - Dutch socialist author, activist, worker representative.
Jan Janssen - cyclist postage stamps.
Johannes Janssen (1829 - 1891) - religious historian; wrote "History of the German People".
Mary Janssen married Charles Calvert, governor of Maryland; ties to George & Martha Washington.
Nicolaas Janssen - saint, (1522 -1572) one of the Martyrs of Gorkum.
 Paul Janssen - discoverer of essential human medicines.
Pierre, Jules, Cesar Janssen - French solar astronomer, discoverer of Helium.
Sacharias Janssen - inventor of the compound microscope.
Theodor, Karl, Peter Janssen - generational family of German artists.
Victor, Emil Janssen - artist (1803 - 1845).

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