Jakob Nielsen

Jacob or Jakob Nielsen may refer to:Jacob Nielsen, Count of Halland, great grandson of Valdemar II of Denmark
Jacob Nielsen (businessman), Norway (1768-1822)
Jakob Nielsen (mathematician) (1890–1959), Danish mathematician known for work on automorphisms of surfaces
Jakob Nielsen, Danish web usability consultant
Jakob Axel Nielsen, Danish lawyer and politician
Jakob Nielsen (actor) (1900-1978)
Jacob Nielsen (cyclist), Danish cyclist
Jakob Ahlmann Nielsen, Danish footballer