Jaap is a Dutch given name that is short for Jacob or Jacobus (Jacob or James in English). People with this name include:

Academics

• Jaap R. Bruijn (1938–2022), Dutch maritime historian
• Jaap Doek (born 1942), Dutch jurist
• Jaap van Ginneken (born 1943), Dutch psychologist and communication scholar
• Jaap Goudsmit (born 1951), Dutch HIV/AIDS researcher
• Jaap M. Hemelrijk (1925–2018), Dutch archaeologist
• Jaap van den Herik (born 1947), Dutch computer scientist
• Jaap van der Hoeden (1891–1968), Dutch and Israeli veterinary research scientist
• Jacob Kistemaker (1917–2010), Dutch nuclear physicist
• Jaap Korevaar (born 1923), Dutch mathematician
• Jaap Kruithof (1929–2009), Belgian philosopher and writer
• Jaap Kunst (1891–1960), Dutch ethnomusicologist
• Jaap Mansfeld (born 1936), Dutch philosopher and historian
• Jaap Murre (1929–2023), Dutch mathematician
• Jaap van Praag (1911–1981), Dutch humanist
• Jaap Schekkerman (born 1953), Dutch computer scientist
• Jaap Sinninghe Damsté (born 1959), Dutch paleontologist
• Jaap van der Vecht (1906–1992), Dutch entomologist
• Jaap van Velsen (1921–1990), Dutch-born British anthropologist
• Jaap J. Vermeulen (born 1955), Dutch botanist
• Jaap Wessels (1939–2009), Dutch mathematician
• Jaap de Wilde (born 1957), Dutch international relations scholar
• Jaap de Zwaan (born 1949), Dutch lawyer and legal scholar
• Jaap Zwemmer (born 1945), Dutch fiscal jurist

Arts

• Jaap Bakema (1914–1981), Dutch modernist architect
• Jaap Berghuis (1945–2005), Dutch artist
• Jaap Blonk (born 1953), Dutch avant-garde composer and performance artist
• Jaap Drupsteen (born 1942), Dutch graphic designer
• Jaap Eggermont (born 1946), Dutch record producer
• Jaap Flier (1934–2022), Dutch dancer and choreographer
• Jaap Gestman Geradts (born 1951), Dutch pin-up artist
• Jaap Klinkhamer (1854–1928), Dutch architect
• Jaap Lamberton, Dutch comics artist
• Jaap ter Linden (born 1947), Dutch cellist, viol player and conductor
• Jaap Reesema (born 1984), Dutch singer
• Jaap Schreurs (1913–1983), Dutch painter and graphic artist
• Jaap Schröder (1925–2020), Dutch violinist, conductor, and pedagogue
• Jaap Spaanderman (1896–1985), Dutch pianist, cellist, and conductor
• Jaap Speyer (1891–1952), Dutch film director
• Jaap Stotijn (1891–1970), Dutch oboist
• Jaap Valkhoff (1910–1992), Dutch musician, composer and lyricist
• Jaap Vegter (1932–2003), Dutch cartoonist
• Jaap van Zweden (born 1960), Dutch violinist and conductor

Politics

• Jaap van Amerongen (1913–1995), Dutch-Israeli economist and government official
• Jaap Boersma (1929–2012), Dutch Minister of Social Affairs
• Jaap Burger (1904–1986), Dutch Minister of the Interior
• Jaap de Hoop Scheffer (born 1948), Dutch Secretary General of NATO
• Jaap Marais (1922–2000), Afrikaner nationalist thinker, author and politician
• Jaap Metz (1941–2016), Dutch journalist and politician
• Jaap Oldenbroek (1897–1970), Dutch trade union leader and politician
• Jaap Pop (born 1941), Dutch mayor of Franeker, Tiel, Alkmaar and Haarlem
• Jaap Schrieke (1884–1976), Dutch jurist and administrator during WWII
• Jaap Smit (born 1957), Dutch preacher and trade unionist

Sports

• Jaap Barendregt (1905–1952), Dutch footballer
• Jaap Beije (1927–2013), Dutch rower
• Jaap Boot (1903–1986), Dutch sprinter and long jumper
• Jaap Bulder (1896–1979), Dutch footballer
• Jaap-Derk Buma (born 1972), Dutch field hockey player
• Jaap Davids (born 1984), Dutch footballer
• Jaap van Dorp (born 1990), Dutch curler
• Jaap van Duijn (born 1990), Dutch footballer
• Jaap Eden (1873–1925), Dutch speed skater and racing cyclist
  • The Jaap Eden Award, Jaap Eden baan and Jaap Edenhal are named after him
• Jaap Enters (born 1939), Dutch rower
• Jaap Havekotte (1912–2014), Dutch speed skater
• Jaap Helder (1907–1998), Dutch sports sailor
• Jaap Kersten (born 1934), Dutch racing cyclist
• Jaap ten Kortenaar (born 1964), Dutch racing cyclist
• Jaap Knol (1896–1975), Dutch javelin thrower
• Jaap Kraaier (1913–2004), Dutch canoeist
• Jaap Krijtenburg (born 1969), Dutch rower
• Jaap van Lagen (born 1976), Dutch racing driver
• Jaap van der Leck (1911–2000), Dutch football manager
• Jaap Leemhuis (1941–2014), Dutch field hockey player
• Jaap Meijer (1905–1943), Dutch track cyclist
• Jaap Mol (1912–1972), Dutch footballer
• Jaap Oudkerk (born 1937), Dutch track cyclist
• Jaap van der Poll (1914–2010), Dutch javelin thrower
• Jaap van Praag (1910–1987), Dutch football administrator, chairman of Ajax
• Jaap Reesink (born 1946), Dutch rower
• Jaap Rijks (1919–2017), Dutch equestrian
• Jaap Schouten (born 1984), Dutch rower
• Jaap Sjouwerman (1891–1964), Dutch wrestler
• Jaap Stam (born 1972), Dutch football player and manager
• Jaap Stenger (1907–1992), Dutch rower
• Jaap Stockmann (born 1984), Dutch field hockey goalkeeper
• Jaap Voigt (born 1941), Dutch field hockey player
• Jaap Weber (1901–1979), Dutch footballer
• Jaap de Zeeuw (born 1954), Dutch sports sailor
• Jaap Zielhuis (born 1966), Dutch sports sailor

Writers

• Jaap ter Haar (1922–1998), Dutch writer of children's books and historian
• Jaap Nunes Vaz (1906–1943), Dutch journalist, writer, and editor

Other

• Jaap Amesz (born 1982), Dutch television personality
• Jaap Blokker (1942–2011), Dutch businessman and executive
• Jaap Haartsen (born 1963), Dutch electrical engineer and inventor of Bluetooth
• Jaap van Meekren (1923–1997), Dutch television journalist and presenter
• Jaap Penraat (1918–2006), Dutch resistance fighter during World War II
• Jaap Staal (1913–1981), Dutch commando during World War II
• Jaap Veldhuyzen van Zanten (1927–1977), Dutch aircraft captain and flight instructor
• Jaap Weideman (1936–1996), South African Navy officer

See also

• Jaap Sahib, Sikh prayer