[1] Najjar was born 2 September 1941 in Tripoli, North Lebanon, and is an adherent of the Greek Orthodox Church.

In 2022, an autobiography covering 1941-1990 was published in Arabic, under the title "Choices and Destiny - Parts of a life", followed by "At the Justice Palace" Najjar is close to the March 14 movement.

He was member of the Constitutional reform Committee, in his capacity as representative of the Lebanon Phalanges Party (year 1985).

Najjar is the owner and editor of The Lebanese Review of Arab And International Arbitration since 1996; he also publishes the Saint Joseph Faculty of Law Journal, Proche Orient Etudes Juridiques, since 1975.

The National medal for Human rights was attributed to Najjar in 2010 after his draft law to abolish death penalty in Lebanon.

In June 2013, he was made Officer of the Legion of Honor by the French President of Republic; in July 2015 he was granted the decoration of Commandor of the Spanish order of Isabella the Catholic.

Since June 29, 2016, Najjar is emeritus professor at the Faculty of Law of the Saint Joseph University, Lebanon.

Moreover, two major judiciary permutations were conducted by him in 2009 and 2010 after having been frozen for several years, and the judges’ remunerations were almost doubled in 2011 in order to upgrade their status.

In August 2023 Najjar is appointed by the Prime minister to preside over the Special Committee to revise the Code of Money and Credit.

Principal Publications - “The Effects of Marriage on the Nationality of the Spouse in Lebanese Law,” doctoral thesis for the D.E.S.

- “The Law of Option, contribution to the study of the potestative right and unilateral act,” foreword by Pierre Raynaud, LG.D.J.