Namesakes
Jacobus of Voragine
(m) 1228-1298 
Saints
Giacomo Benefatti
(a.k.a. Jacobus) (m) ?-1332
Saints
Jacobus Lacobs
(m) ?-1572
Saints
Jacob de Kempenaer
(a.k.a. Jacobus) (m) 1793-1870
Dutch Prime Ministers 1848-1849
Jacobus Kapteyn
(m) 1851-1922
Notable Scientists and Inventors
Jacobus Henricus van 't Hoff
(m) 1852-1911
Nobel Prize Winners 1901 (chemistry)
Notable Scientists and Inventors
Jo van Gastel
(middle name Jacobus) (m) 1887-1969
Olympic Medalists 1920 archery - moving target 28 m, team (gold)
Jim Thorpe
(a.k.a. Jacobus) (m) 1887-1953
Hall-of-Famers 1963 (football)
Notable Actors and Entertainers (actor)
Notable Athletes (football)
Olympic Medalists 1912 decathlon; pentathlon (gold)
Lucebert
(middle name Jacobus) (m) 1924-1994
Notable Artists
Notable Writers
Joop Rohner
(middle name Jacobus) (m) 1927-2005
Olympic Medalists 1948 water polo (bronze)
Koos Andriessen
(m) 1928-2019
Notable Politicians and Statespeople
Dick Quax
(middle name Jacobus) (m) 1948-2018
Olympic Medalists 1976 5000 m (silver)
Youp van 't Hek
(middle name Jacobus) (m) 1954-
Notable Actors and Entertainers (comedian)
Joost Zwagerman
(middle name Jacobus) (m) 1963-2015
Notable Writers
Jaco Venter
(m) 1987-
Notable Athletes (cycling)
Willie le Roux
(middle name Jacobus) (m) 1989-
Notable Athletes (rugby)