Olaf Henning Thommessen (born 1 August 1966) is the Chief Executive Officer of SMB Norge, The Norwegian Association of Small & Medium Enterprises and a former politician for the Liberal Party. Thommessen is a Roman Catholic of French and Norwegian descent. Olaf's mother, Annette Hilda Eliane Thommessen, née Arosa (1932–1994), was a French national, and his father was Henrik Peter Thommessen, a son of Olaf D. Thommessen, grandson of Anne and Rolf Thommessen and great-grandson of Ola Thommessen. Annette and Henrik Thommessen were married from 1953–1978.