He was the son of Youssef Beik El-Zein, a prominent Lebanese figure. Two of his brothers also previously served as Members of Parliament: Abdelkarim El-Zein and Abdelmajid El-Zein. Following the 1953 legislative elections the eldest Member of Parliament at the time was Youssef El-Zein who headed the opening parliament session for electing the parliament speaker. The youngestelected Member of Parliament in that year was Ghassan Tueni. 56 years later elected MP Abdelatif El-Zein is parliament's eldest member who is scheduled to play the same role his father Youssef did in 1953. In an additional coincidence elected Beirut 1 MP Nayla Tueni is now one of parliament's youngest members as her grandfather Ghassan was in 1953.