Hetty Carr Cary (May 15, 1836 – September 27, 1892) was the wife of Confederate General John Pegram and, later, of pioneer physiologist H. Newell Martin. She is best remembered for making the first three battle flags of the Confederacy (along with her sister and cousin). Hetty was related to two of Virginia's most influential families, the Jeffersons (through her mother's family) and the Randolphs (through her paternal grandmother, Virginia Randolph Cary). She was also a lineal descendant of Pocahontas.