Johanna Geertruida van Cittert-Eymers

Johanna Geertruida (Truus) van Cittert-Eymers (, 1903–1988) was a Dutch physicist, historian of science, museum director and author.

Career Eymers began work as a researcher in the experimental physics group of Leonard Ornstein at Utrecht University in 1929 and in 1932 became the head of the teaching laboratory. Eymers graduated cum laude with a PhD in 1935 and did postdoctoral research in biophysics, specifically on luminescent bacteria.

After her marriage to Pieter Hendrik van Cittert in 1938, Van Cittert-Eymers's employment was terminated because of the marriage bar which was effective in the Netherlands until 1957. She resented her loss of employment and worked unpaid to assist her husband in his work as curator of the University Museum. The couple had a son, Benjamin, in 1939 who died in infancy and a daughter, , in 1943 who became a biologist.