Dray is also a JEWISH surname !!!
There are thousands of "Dray" in France,Morocco, Quebec and Israel (with other related surnames as Edery, Dhery, Dhrey, Draï ). It's a sephardi jewish surname. All of them come from Algeria or Morocco, and the possible origin of this name is "Drahi : a man from the Drââ", a river name and a valley name in the south of Morocco. There's also a river called "Drââ" in Syria, so it could be a pre-exod jewish surname related to this place...