Four Jacks was a Danish quartet. The group was formed in 1956 with the original lineup consisting of Poul Rudi, Otto Brandenburg, Bent Werther and John Mogensen. Otto Brandenburg left in 1958 and was replaced by James Rasmussen. By the end of 1963 the group members went their separate ways. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.