Martha Dandridge Custis Washington (June 2, 1731 O.S. – May 22, 1802) was the wife of George Washington, who was the first president of the United States. Although the title was not coined until after her death, she served as the inaugural first lady of the United States, defining the role of the president's wife and setting many precedents that future first ladies observed. During her tenure, she was referred to as "Lady Washington". Washington is consistently ranked in the upper half of first ladies by historians.
https://en.wikipedia.org/wiki/Martha_Washington