"Abd" is Arabic and means "servant of", and in this form will be used by Muslims and Christians (quite possible that it is also used for Jews, but I would not have known until now). 'Abd Al-Hadi "is an example in the Qur'an 94 of 99 names of Allah. "Al-Hadi" means "giving the line" or "the leader". So Abd-Elhady means the servant of the leader. A common name for Middle Eastern Christians, for example, 'Abd al-Massih "- the servant of the Messiah (Jesus).