Namesakes
Austrian Chancellors and Presidents:
1 president
(president) Michael Hainisch (middle name Jakob) 1920-1928 
Fictional Characters from Books:
1 character
Jacob Heym (a.k.a. Jakob) 1969 Jakob the Liar
Notable Athletes:
2 soccer
(soccer) Jaap Stam 1972-
(soccer) Jakob Jantscher 1989-
Notable Businesspeople:
1 businessperson
Jakob Fugger 1459-1525
Notable Politicians and Statespeople:
1 politician
Jaap de Hoop Scheffer 1948-
Olympic Medalists:
1 gold, 1 silver
(silver) Jakob Silfverberg 2014 ice hockey
(gold) Jakob Ingebrigtsen 2020 1500 m
Saints:
3 blessed
Blessed Jakob Griesinger of Ulm 1407-1491
Blessed Jakob Kern 1897-1924
Blessed Jakob Gapp 1897-1943
Swiss Presidents:
3 presidents
Jakob Stämpfli 1856; 1859; 1862
Jakob Dubs 1864; 1868; 1870
Johann Jakob Scherer 1875