Gunnar Høst Sjøwall (22 January 1936 – 9 September 2013) was a Norwegian portrait photographer and former competitive tennis player. Sjøwall was a son of photographer Gunnar Theodor Sjøwall. As a child, he showed early promise in tennis and was given intensive training. Sjøwall went on to compete in tennis, winning 14 national championships between 1955 and 1966. He also made good showings in several international tournaments. He represented the clubs SK Njård and Stabekk TK. He died in September 2013.