maybe its my poor vocab....would you call them veils if they cover the back of the heads instead of their faces?
It is called a Cowl from the Latin cuculla, meaning "a hood"
Uhm... you must - they are white (afaik), and were very popular in the old arab sets... Then had a (red?) "ring" on top.. Example: 3586 (from playmobil.de)
I would only have applied that where the head covering was attached** to the body of the garment.
As playmofire pointed out ghutra is the name of the head dress worn by Arabs.