Nobel laureates with a physics Ph.D. from Leiden University
1981 physics prize	Nico Bloembergen Ph.D. 1948 with Cor Gorter Nuclear Magnetic Relaxation
1975 economics prize	Tjalling Koopmans Ph.D. 1936 with Hans Kramers Linear regression analysis of economic time series
1969 economics prize	Jan Tinbergen Ph.D. 1929 with Paul Ehrenfest Minimumproblemen in de natuurkunde en de economie
1910 physics prize	Johannes van der Waals Ph.D. 1873 with Pieter Rijke Over de continuiteit van den gas- en vloeistoftoestand
1902 physics prize	Hendrik Lorentz Ph.D. 1875 with Pieter Rijke Over de theorie der terugkaatsing en breking van het licht
1902 physics prize	Pieter Zeeman Ph.D. 1893 with Heike Kamerlingh Onnes Metingen over het verschijnsel van Kerr

Outside of physics, there are two more Leiden Ph.D. alumni who went on to win a Nobel prize:

Tobias Asser, 1860 Ph.D. in law, 1911 Nobel peace prize.

Niko Tinbergen, 1932 Ph.D. in biology, 1973 Nobel prize in medicine.