Mohamed Atta
Atta was born on September 1, 1968, in Kafr el-Sheikh, located in Egypt's Nile Delta region. His father, Mohamed el-Amir Awad el-Sayed Atta, was a lawyer, educated in both sharia and civil law. His mother, Bouthayna Mohamed Mustapha Sheraqi, came from a wealthy farming and trading family and was also educated. Bouthayna and Mohamed married when she was 14, via an arranged marriage. The family had few relatives on the father's side and kept a distance from Bouthayna's family. In-laws characterized Atta's father as "austere, strict, and private," and neighbors considered the family reclusive. Atta was the only son; he had two older sisters who are both well-educated and successful in their careers — one as a medical doctor and the other as a professor.
Mohamed Salah Ben Mrad
Born in the Medina of Tunis near the Tourbet el Bey, Mohamed Salah was the son of the Hanafi Bach-mufti, Sheikh H'mida Ben Mrad, a specialist in rhetoric and the elder brother of the sheikhs Neji (who served as qadi and mufti) and Brahim Ben Mrad (who served as imam,teacher at the Zaytuna,judge at the Tunis tribunal). He came from a family of Tunis scholars and intellectuals of Ottoman origin, from Turkey. Dating back to the seventeenth century, his grandfather Murad Khodja was part of the military army of Sinan Pasha, who participated in the battle of La Goulette against the army of Charles V in 1574. 
He completed his studies at the Zaytuna and left in 1900.