Johannes Schwartz Brun (13 May 1891 – 24 July 1977) was a Norwegian businessperson, military officer and bridge champion.
He was born in Fredrikstad as a son of Sven Busch Brun (1861–1916) and Signe Marie Friis Giebelhausen (1867–1949).
He was the manager of timber export company Norsk Trælastexport from 1916 to 1935, and also edited the bridge column in the newspaper Aftenposten from 1924 to 1972.
In 1951 he was promoted to colonel, serving as commander of Akershus Dragoon Regiment no.
[1] He died in July 1977 and was buried at Vår Frelsers gravlund.