Namesakes
Dutch Prime Ministers:
1 prime minister
Dirk Jan de Geer 1926-1929; 1939-1940 
Fictional Characters from Song Titles:
1 character
(character) Dirk 1979 Dirk Wears White Sox
Hall-of-Famers:
1 basketball
(basketball) Dirk Nowitzki 2023
Harry Potter Characters:
1 character
Dirk Cresswell
Most Valuable Players:
1 winner
Dirk Nowitzki 2007 basketball
Notable Actors and Entertainers:
1 actor
Coen van Vrijberghe de Coningh (a.k.a. Dirk) 1950-1997
Notable Athletes:
2 soccer, 1 basketball
(basketball) Dirk Nowitzki 1978-
(soccer) Dirk Kuijt 1980-
(soccer) Klaas-Jan Huntelaar (a.k.a. Dirk) 1983-
Notable Politicians and Statespeople:
3 politicians
Dirk Fock 1858-1941
Dirk Stikker 1897-1979
Dick Dolman (a.k.a. Dirk) 1935-2019
Olympic Medalists:
2 bronze, 1 gold, 1 silver
(silver) Dirk Korthals 1984 swimming - 4x200 m freestyle relay
(bronze) Dirk Theismann 1984 water polo
(bronze) Dirk Richter 1988; 1992 swimming - 4x100 m freestyle relay
(gold) Dirk Schrade 2012 equestrian
Saints:
1 saint
Saint Theodorus van der Eem (a.k.a. Dirk) ?-1572