Grace Murray Hopper ... too, from Yale. This wasn't just rare for a woman: statistics show only 1,279 math PhDs were awarded between 1862 and 1934, the year Hopper received hers.
[Grace Hopper] had been the first woman to receive a Ph.D. in mathematics at Yale. Which is even more impressive as she didn’t want to study mathematics in the first place. She entered the Navy ...