Dear Ariel: For Non-Semitic languagesit's very difficult to recognize between "h" and "hh", or "d' and "dd", so I think if you don't know Arabic you can't recognize between them, but be sure that the surnames Haddad, Hadad and Hhaddad are the same in Arabic. I will tell you the story of Ghassanids, but firstly excuse me because it's long! In the tradition Arabs are divided into two big branches: Sons of Joktan (Joktan is son of Eber son of Shelah son of Arpach'shad son of Shem son of Noah, their story is in Genesis 10), the other branch of Arabs are the sons of Adnan grandson of Ismail son of Abraham, but Ghassanids are from the sons of Joktan, and here you are the story of Ghassanids: Joktan had many sons , one of them was Sheba, Sheba founded a very wealthy kingdom which was called after him , and in Old testament (First Kings 10) you can see the story of the Queen of Sheba who visited the King Solomon in Palestine to listen to his wisdom, Sheba was a Great kingdom , Ghassan- Father of Ghassanids -was a very noble ,royal and wealthyman in this kingdom. In the second century AD, a big flood happened in the kingdom of Sheba and many cities were destroyed, so the Ghassanids ( descendents of Ghassan) decided to leave Sheba to a safe country, they went to a region in Syria called Hauran ( south of Damascus), and there they were converted to Christianity (they were Pagans) and founded a new Kingdom ,Ghassanid Kingdom,this kingdom reached its supreme power in the sixth century and the Ghassanid king was called (King of All Arabs),they were vassals to Eastern Roman (Byzantine) Empire. many of Ghassanid kings and poets were very famous in the history of Syria and Arabia. In the seventh century the Islamic invasion happened and Ghassanidsfought against Muslim army but quantity defeated the quality and many Ghassanidsfled to Europe to save their Christianity, some Ghassanids went to Lebanon when the resisted Muslim Invasion for a long time and the rest of Ghassanids stayed in Hauran and after they branched in all Syria and Lebanon, many families in these countries are descended from Ghassanids. Most of the families Hadad are descended from Ghassanids . Could you tell me where were the Hadads whomyou are looking for ( Give me the name of the village or the city)? If you want more information tell me!