Ms. Joesoef is the eldest daughter of Dr. Sumarsono Sastrowardoyo, a physician, surgeon and memoirist, and the late Ina Sastrowardoyo. An older brother, Ariawan Sastrowardoyo, died in 1995. Another brother, Dr. Aswin W. Sastrowardoyo, is a physician who was formerly a guitarist and vocalist with the music group
Chaseiro from 1979 to 1983, and a younger sister, Lisa Damayanti Sastrowardoyo (b. 1962). The actress
Dian Sastrowardoyo is a niece of Ms. Joesoef. She was married to the late Mr. Iwan V. Joesoef, a businessman, and has two sons Marwan Arie Joesoef (born 26 May 1976), Nurfahd S. Joesoef (born 4 March 1979) and one daughter Tiara R. Joesoef (born 5 July 1999). Her paternal grandfather, Sutejo Sastrowardoyo, traced the family's ancestry back 18 generations to 15th century Java. ==Languages==