What was Martha Washington's maiden name?

Martha was born Martha Dandridge.

She became Martha Dandridge Custis when she married her first husband, Daniel Parke Custis, in 1750. After Daniel's death in 1757, she married George Washington on January 6, 1759.

Two of her children by Custis were still living at the time : John "Jacky" Custis was 4, and Martha ("Patsy") Custis was 2.