Please check my Husbands family site Dahdah Family Tree see if any of the old Dahdahs are familiar.
I was told that the name came from Lebanon originally, the families separated to different part of the Middleast and across the world mostly to the Americas (Latin America). Sometimes you can recognize by photos a facial features as it happened with my family tree. We know that my Husband Edward dahdah has still family in the States mainly known in California, and also in Australia.
His family lived mainly in Jaffa and Haifa when they were young then on the 1948 upraising they were on holiday in lebanon with relatives and this is were they had to move on as they could not enter palestine. Edward was born in Alayroun lebanon, after him they moved to Jordan Amman, Jabal Husien area and stayed there till 1968 when they (all the family)slowly moved to Canada. We all now live in Ontario, Canada.
Yes the Dahdah Family is big and everywhere. Just like you we can only go so far as grandparents did mention dates and people by their full name, e.g. he was born on the first day it snowed in Alayroun it was before Christmas (Edward). Some of the churches and Mousques were thorn down therefore papers were hard to get,we met a Dahdah that is also Muslim living in Jordan, we simply had to keep asking other relatives, and I still am.
I would like to hear from you if this tree applies to your family too. So check it out!!!!

Regards,
Margaret Dahdah Bowman