Ruth Katherina Martha Pfau, FCM was a German–Pakistani Catholic Christian religious sister and physician who was a member of the "Society of the Daughters of the Heart of Mary". She emigrated from Germany in 1961 and devoted more than 55 years of her life to fighting leprosy in Pakistan. Pfau was honoured with Hilal-e-Pakistan, Hilal-i-Imtiaz, Nishan-i-Quaid-i-Azam, and the Sitara-i-Quaid-i-Azam awards.
