Winifred Edgerton Merrill
Winifred Edgerton (September 24, 1862 – September 6, 1951) was born in Ripon, Wisconsin. She was the first woman to receive a degree from Columbia University and the first American woman to receive a PhD in mathematics. She was awarded a PhD with high honors from Columbia University in 1886, by a unanimous vote of the board of trustees, after being rejected once.